As many as 88 companies, including Bharti Airtel, Hero MotoCorp, Abbott India and Info Edge, have fixed record dates for dividends, stock splits, bonus issues and other corporate actions this week. Investors must hold shares in their demat accounts on the respective record dates to be eligible. Here is the complete day-wise list of key corporate actions to track.

As many as 88 companies, including Bharti Airtel, Hero MotoCorp, Abbott India, Info Edge and others, have fixed their record dates for corporate actions such as stock splits, bonus issues and dividends this week.

Investors must hold shares of these companies in their demat accounts on the respective record dates to be eligible for the announced corporate actions. The list remains tentative, as more companies may announce record dates for dividends, bonus issues and stock splits during the week.

Here is a day-wise list of corporate actions to watch out for:

July 20 (Monday)

Monday will see 12 stocks turn ex-record date for their respective dividends, while one stock will turn ex-record date for a stock split. Heavy engineering components maker Simplex Castings has fixed July 20 as the record date for its 1:5 stock split.
Graphite India will pay a final dividend of Rs 7 per share, with the record date fixed on Monday. Textile player KPR Mill will pay a dividend of Rs 2.5 per share. Other companies that have fixed Monday as the record date for their respective dividends include AccelerateBS India (Rs 0.1 per share), Aditya Infotech (Rs 1.64 per share), Fairchem Organics (Rs 1 per share), Happy Forgings (Rs 4 per share), NDR Auto Components (Rs 4 per share), Nelcast (Rs 0.7 per share), Nesco (Rs 7 per share), Pokarna (Rs 0.6 per share), Quest Capital Markets (Rs 2.5 per share) and SPR Auto Technologies (Rs 5 per share).July 21 (Tuesday)

Lead, lead alloys and plastic additives producer Pondy Oxides & Chemicals has fixed July 21 as the record date for its 2:5 stock split. Apart from this, eight companies have fixed Tuesday as the record date for their respective dividends.

These include Angel One (Rs 1 per share), Cholamandalam Investment and Finance Company (Rs 0.7 per share), Indo Borax & Chemicals (final dividend of Rs 10 and special dividend of Rs 30), Jaro Institute of Technology Management and Research (Rs 3 per share), Ksolves India (Rs 4 per share), Laxmi Organic Industries (Rs 0.3 per share), Punjab & Sind Bank (Rs 0.39 per share) and Rainbow Children’s Medicare (Rs 3.5 per share).

Also read: Wall Street’s chip index enters bear market! Is the AI bubble finally going bust?

July 22 (Wednesday)

Wednesday will see 11 stocks turn ex-record date for their respective dividends. Pressure cooker and kitchen appliances manufacturer Hawkins Cookers stands out with a hefty final dividend of Rs 140 per share, while mutual fund house Aditya Birla Sun Life AMC will pay a final dividend of Rs 25.5 per share.

Apart from these, nine other companies have fixed Wednesday as the record date for their respective dividends. These include Cosmo First (Rs 4 per share), Goodricke Group (Rs 2 per share), HEG Ltd (Rs 3.4 per share), Menon Bearings (interim dividend of Rs 2 per share), Ram Ratna Wires (Rs 2.5 per share), Sanco Trans (Rs 4.5 per share), Sarla Performance Fibers (Rs 2 per share), Thangamayil Jewellery (Rs 18 per share) and Wires & Fabriks (S.A.) (Rs 0.1 per share).

Notably, Triveni Engineering & Industries has also fixed Wednesday as the record date for the demerger of its power transmission business.

July 23 (Thursday)

Thursday will see 13 stocks turn ex-record date for their respective dividends. Credit rating agency ICRA Ltd stands out by rewarding shareholders with a final dividend of Rs 70 per share and a special dividend of Rs 35 per share, while welding and cutting equipment manufacturer Esab India will pay a final dividend of Rs 25 per share.

Apart from these, 11 other companies have fixed Thursday as the record date for their respective dividends. These include ABM Knowledgeware (Rs 1.25 per share), Afcons Infrastructure (Rs 2 per share), Banswara Syntex (Rs 1 per share), Bhagiradha Chemicals & Industries (Rs 0.15 per share), D.B. Corp (interim dividend of Rs 5 per share), Mangalam Worldwide (Rs 0.3 per share), Oriental Hotels (Rs 0.65 per share), Paushak Ltd (Rs 2.5 per share), Pidilite Industries (Rs 11.5 per share), Precision Camshafts (Rs 1 per share) and Sudeep Pharma (Rs 1.5 per share).

July 24 (Friday)

Friday will see 34 stocks turn ex-record date for their respective dividends, one stock for its stock split, and one company executing both a bonus issue and a stock split. Pharma heavyweight Abbott India stands out by rewarding shareholders with a dual payout — a final dividend of Rs 525 per share and a special dividend of Rs 131 per share.

Voltamp Transformers will pay a substantial final dividend of Rs 100 per share, while telecom major Bharti Airtel will distribute Rs 24 per share. Software and IT services player Sasken Technologies will pay Rs 13 per share. Intellect Design Arena has also lined up a double reward, offering a final dividend of Rs 4 per share and a special dividend of Rs 3 per share.

Apart from these, 28 other companies have fixed Friday as the record date for their respective dividends. These include Advanced Enzyme Technologies (Rs 1.35 per share), Bhageria Industries (Rs 2.5 per share), Birla Corporation (Rs 12.5 per share), Bombay Cycle & Motor Agency (Rs 5 per share), Chembond Chemicals (Rs 1.25 per share), Concord Biotech (Rs 7.55 per share), Cravatex Ltd (Rs 13 per share), Crompton Greaves Consumer Electricals (Rs 3 per share), Data Patterns (India) (Rs 10 per share), Divi’s Laboratories (Rs 30 per share), Elcid Investments (Rs 25 per share), Fiem Industries (Rs 40 per share), Hero MotoCorp (Rs 75 per share), Info Edge (India) (Rs 3.6 per share), Joindre Capital Services (Rs 2 per share), Jubilant Ingrevia (Rs 2.5 per share), Jubilant Pharmova (Rs 5 per share), Karur Vysya Bank (Rs 2.6 per share), Kirloskar Brothers (Rs 7 per share), Lakshmi Electrical Control Systems (Rs 3 per share), Mitsu Chem Plast (Rs 0.2 per share), Neuland Laboratories (Rs 34 per share), Nitta Gelatin India (Rs 7 per share), Nocil Ltd (Rs 1.5 per share), Orient Bell (Rs 1 per share), PDS Ltd (Rs 1.65 per share), Radico Khaitan (Rs 9 per share), Refex Industries (Rs 1 per share), Rishabh Instruments (Rs 2 per share), Shetron Ltd (Rs 1 per share), SIL Investments (Rs 2.5 per share), Siyaram Silk Mills (Rs 5 per share), Steelcast Ltd (Rs 0.54 per share) and Swelect Energy Systems (Rs 3.5 per share).

Moving beyond cash payouts, structural share adjustments will also close out the week. Kalind has fixed Friday as the record date for a dual corporate action: a 1:2 bonus issue along with a stock split, reducing the face value of shares from Rs 10 to Rs 2. Meanwhile, PS Raj Steels has also fixed Friday as the record date for its stock split, subdividing equity shares from a face value of Rs 10 to Rs 2.

Also read: Bharti Airtel fixes record date for its highest-ever dividend of Rs 24/share. What’s the last date to buy?

(Disclaimer: Recommendations, suggestions, views and opinions given by the experts are their own. These do not represent the views of The Economic Times)

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Sunday’s edition of The New York Times’ Connections puzzle sent players through electrical terminology, digital slang, bathroom fixtures and a tricky wordplay category built around facial expressions, delivering what many players rated as one of the tougher boards of the week.

Connections challenges players to sort 16 words or phrases into four hidden groups of four, with each group tied to a shared theme. The categories are ranked by difficulty and color-coded accordingly, running from yellow for the most straightforward group to purple for the trickiest, which frequently leans on wordplay, hidden patterns or double meanings. Players are allowed four total mistakes before the puzzle ends, and the daily game continues to rank among the Times’ most popular digital offerings alongside Wordle.

Sunday’s yellow group, the day’s easiest category, centered on components of an electrical circuit: BREAKER, FUSE, RELAY and SWITCH. Each term describes a distinct piece of hardware involved in controlling or protecting the flow of electrical current, from a circuit breaker that interrupts power during an overload to a switch that opens or closes a circuit manually.

The green group asked players to identify digital coupling verbs: CONNECT, JOIN, PAIR and SYNC. Each word describes the act of linking two devices, accounts or pieces of technology together, a category that reflects increasingly common tech vocabulary from Bluetooth pairing to account syncing across platforms. Several solvers reported briefly grouping FUSE into this category as well, given that fusing two things together could plausibly be read as another coupling verb, before recognizing that FUSE more properly belonged among the yellow group’s circuit components.

Moving into the blue category, the puzzle’s third-hardest group, Sunday’s theme centered on things toilets do: DRAIN, FLUSH, REFILL and SWIRL. Each word describes a distinct stage or action within a standard toilet’s operating cycle, from the swirling motion of water during a flush to the tank refilling itself afterward. Commentators covering the puzzle noted this category proved to be one of the more elusive groupings of the day, since each individual word carries several other plausible meanings outside the bathroom-specific context the puzzle intended.

The purple group, traditionally the day’s most difficult and prone to misdirection, asked players to identify words that could each follow a blank to form a facial expression: GAME, LONG, POKER and STRAIGHT. Adding “face” after each word produces a familiar phrase: game face, long face, poker face and straight face. One player detailing their solving process online said the connection clicked immediately upon seeing POKER, which brought to mind Lady Gaga’s debut hit “Poker Face,” before GAME and STRAIGHT followed naturally, along with LONG, tied to the familiar bar joke about a horse being asked why it has such a long face.

Puzzle trackers following Sunday’s board noted several deliberate red herrings built into the grid, designed to nudge solvers toward incorrect groupings before the true categories became clear. The overlap between FUSE fitting both the circuit-components and digital-coupling themes, along with the multiple plausible meanings behind several of the toilet-related words, made Sunday’s puzzle a notably tricky solve even for experienced players. One columnist covering the puzzle for TechRadar rated the day’s difficulty as “hard” and reported finishing with a single mistake, made by initially placing FUSE in the digital coupling group before recognizing the more fitting circuit-components category.

For players working through the puzzle without hints, general strategy guidance suggests beginning with the most straightforward, tightly defined categories, such as Sunday’s electrical-components yellow group, before moving on to categories requiring lateral thinking or wordplay recognition, such as the purple group’s hidden “face” pattern. Players are also encouraged to watch for words that plausibly fit more than one category, a hallmark of Connections’ design that becomes especially relevant once the easier groups have already been solved. The game’s “one away” feature, which alerts players when three of their four selected words belong to the same group, can also serve as a useful tool for refining guesses without immediately triggering a mistake.

Sunday’s puzzle continued a run of thematically varied boards throughout the week, following Saturday’s grid, which grouped ways to commit a basketball violation, words meaning belief, elements tracked in video games, and words that follow “pop.” That board included CARRY, DOUBLE DRIBBLE, GOALTEND and TRAVEL in its basketball-violation yellow group; ATTITUDE, MIND, OPINION and VIEW in its belief-themed green group; HEALTH, LIVES, SCORE and TIME in its video-game blue group; and CULTURE, FLY, QUIZ and TART in its “pop”-themed purple group.

The complete answers for Sunday, July 19, puzzle number 1,134, are as follows: the yellow group, tied to circuit components, includes BREAKER, FUSE, RELAY and SWITCH; the green group, built around digital coupling verbs, includes CONNECT, JOIN, PAIR and SYNC; the blue group, centered on things toilets do, includes DRAIN, FLUSH, REFILL and SWIRL; and the purple group, built around words that precede “face” to form an expression, includes GAME, LONG, POKER and STRAIGHT.

Connections has built a devoted daily following since its 2023 debut by combining accessible mechanics with puzzles that consistently reward pattern recognition and careful reading over quick guessing, a formula that has helped the game rival Wordle in daily engagement even as it demands a different style of reasoning from players. The game is available daily alongside the Times’ broader puzzle lineup, including Wordle, Strands, the traditional Crossword, Letter Boxed and Sudoku, with a new Connections board set to go live at midnight local time for players looking to keep their streaks intact heading into the new week.

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Artificial intelligence spending is projected to surpass $2.5 trillion globally by the end of 2026, according to industry research, as the technology continues its rapid shift from experimental pilot programs into core enterprise infrastructure. With that scale of investment reshaping markets from Silicon Valley to Shanghai, here is a look at 30 of the companies analysts and investors say are most worth watching this year, spanning chipmakers, cloud giants, frontier AI labs and fast-growing startups.

The infrastructure backbone. No conversation about AI in 2026 starts anywhere but Nvidia, whose graphics processing units remain central to model training worldwide. According to VanEck, Nvidia‘s relevance is expanding beyond training into inference, networking and full-system deployments as AI usage shifts from experimentation into production. Taiwan Semiconductor Manufacturing Company sits just behind it in importance, serving as the advanced foundry manufacturing many of the chips that power the broader AI ecosystem; VanEck notes that AI demand ultimately depends on whether enough leading-edge manufacturing and packaging capacity can come online to meet it. Broadcom, cited by Wedbush among its top AI plays for 2026 alongside Nvidia, has built out custom AI silicon for major cloud providers, while CoreWeave has emerged as a key specialized cloud provider built specifically around GPU-heavy AI workloads.

The hyperscalers. Microsoft, Amazon, Google and Meta together are on track to spend close to $700 billion on AI infrastructure in 2026 alone, according to industry analysis, a figure exceeding the entire gross domestic product of most countries. Microsoft has emphasized security and compliance features to make enterprise customers comfortable deploying AI at scale, with its Copilot assistant active in more than a million enterprise seats and Azure AI revenue growing sharply quarter over quarter. Wedbush has argued the market underestimates Microsoft’s Azure growth story heading into 2026 amid rising demand from corporate technology leaders. Alphabet’s Google continues to advance its Gemini model family alongside DeepMind, its research-focused AI division, which continues driving fundamental breakthroughs that feed into applied AI solutions across scientific, healthcare and optimization fields. Amazon’s AWS cloud division remains a critical AI infrastructure provider, and Meta continues pushing open-weight models through its Llama family of large language models, spanning sizes from 8 billion to 405 billion parameters.

Apple’s different path. Apple has taken a notably different approach than its cloud-first competitors, partnering with Google’s Gemini to power a revamped version of Siri set to launch this year rather than building out massive proprietary training infrastructure of its own. Despite that lighter-touch strategy, analysts including HSBC have pointed to Apple’s approach as a genuine strength, arguing the company’s relatively modest capital spending, combined with its enormous installed base of active devices, positions it well as AI adoption broadens beyond the infrastructure-buildout phase.

The frontier labs. Several of the most closely watched AI companies remain privately held, including OpenAI, Anthropic, xAI and Databricks, each of which would likely rank among the largest AI companies in the world by valuation if publicly traded. Elon Musk’s xAI closed a $20 billion funding round in the first week of 2026 alone, reflecting the scale of capital continuing to flow into frontier model development even among companies that have not yet gone public.

Enterprise software and applied AI. Palantir has drawn particular attention from analysts, with Wedbush forecasting the data-analytics company could grow into a $1 trillion business as it expands both government and commercial AI software contracts. Other application-layer names commonly cited by investors include C3.ai, UiPath, SoundHound AI and Upstart, each applying AI to specific business functions ranging from customer service automation to underwriting and process automation, though analysts caution that valuation risk tends to run highest in this category given how many application-layer AI companies remain pre-profitability. IBM continues to carve out relevance through its enterprise AI platforms and hybrid cloud strategy, with a particular focus on governance and explainability that has made it attractive to industries requiring secure, auditable AI deployments. Salesforce and Adobe have also built out AI features across their existing enterprise software suites, with Adobe in particular trading at a comparatively low valuation relative to other AI-linked stocks despite its AI integration efforts.

Fast-growing startups. Beyond the largest labs, a wave of well-funded startups continues attracting significant venture capital. Anthropic rival Perplexity AI has built a search-focused AI product with growing enterprise traction, while Mistral AI has positioned itself as a leading European alternative to U.S.-based frontier labs. Anysphere, the company behind the AI coding assistant Cursor, has drawn substantial funding as AI-assisted software development tools gain traction among developers. LMArena, a platform for benchmarking and comparing AI models, reached a $1.7 billion valuation in under four months earlier this year, according to industry tracking. Overall, AI startups raised nearly $150 billion in 2025 alone, accounting for more than 40% of global venture capital funding, with foundation model companies specifically raising roughly $80 billion of that total.

China’s rising contenders. Chinese AI development has accelerated sharply, led by companies including DeepSeek, whose earlier open-source model releases rattled global markets and intensified competitive pressure across the industry, and Beijing-based Moonshot AI, whose Kimi chatbot has become one of the most widely used consumer AI products in China. Alibaba, Tencent and other major Chinese technology conglomerates continue investing heavily in domestic AI labs, while newer entrants such as Zhipu AI have built out competing large language models aimed at both domestic and international developers.

Development and consulting specialists. Rounding out the landscape are AI engineering and product-development firms such as Azilen Technologies, which has built a reputation helping enterprises move AI systems from prototype into production-ready deployment, spanning data engineering, generative AI, autonomous AI agents and machine learning operations.

Taken together, the current top 20 publicly traded AI companies alone control a combined market capitalization exceeding $25 trillion, according to industry tracking, underscoring just how central artificial intelligence has become to global markets heading into the back half of 2026. Analysts caution that AI exposure is not a single, uniform trade, urging investors to think across distinct categories, including infrastructure enablers, AI developers and AI adopters, as the technology continues its shift from a one-cycle story into what many now describe as a long-duration transformation in how software, services and physical devices operate.

Hannah Rapp, a rising professional boxer who challenged for a WBC world championship just last month, died Saturday morning after being struck by a car while riding her bicycle in Brazos County, Texas, according to the Brazos County Sheriff’s Office. She was 26.

According to the sheriff’s office, Rapp was riding along a highway when a car passed her before suddenly coming to a stop, shifting into reverse and striking her. She was transported to a local hospital, where she was later pronounced dead.

The driver of the vehicle, identified by police as 31-year-old Charles Medina, was arrested and charged with manslaughter. He was being held at the Brazos County Detention Center as of Saturday.

WBC president Mauricio Sulaiman issued a statement mourning Rapp’s death on behalf of the organization. “The loss of Hannah Rapp leaves us heartbroken,” Sulaiman wrote. “She was an exceptional boxer, but above all, an invaluable member of our boxing family. We join in the grief that overwhelms her loved ones, her team, and all those who had the privilege of knowing and supporting her throughout her brilliant career.”

Rapp, who fought professionally under the nickname “Hanarchy,” was a native of Yorktown, Indiana, and competed as a track athlete at Purdue University before transitioning to boxing. She relocated to College Station, Texas, where she turned pro in 2024 while working full-time as a fire and life safety inspector at Texas A&M University, balancing her budding boxing career with a demanding day job.

Rapp built a professional record of 8-0-1 before earning a shot at one of the sport’s biggest opportunities. In June, she challenged Tiara Brown for the WBC women’s featherweight world championship at MVPW-04, an event held at the Caribe Royale Resort in Orlando as part of the Most Valuable Promotions banner co-founded by Jake Paul. Rapp turned in a spirited performance against Brown but ultimately lost by unanimous decision, a result that brought her professional record to 8-1-1.

Brown, the reigning champion Rapp faced in that bout, paid tribute to her former opponent in a comment on an Instagram post from Most Valuable Promotions honoring Rapp’s memory. Brown described Rapp as “the best dance partner I have ever faced as a pro,” recalling a moment before their fight that stuck with her. “When she asked for my autograph, it filled my heart because we were getting ready for war, yet she was still asking for my autograph,” Brown wrote. “It made me smile, we fought a GREAT fight for the fans from the 1st bell to the last! It was my honor to share the ring with her.”

Rapp’s death comes at a moment of growing visibility for women’s professional boxing, with high-profile promotions like Most Valuable Promotions helping bring increased attention and larger stages to fighters like Rapp and Brown. Her June title challenge represented one of the biggest opportunities of her still-young career, arriving less than two years after she turned professional.

The circumstances of Saturday’s crash, particularly the account of the vehicle stopping and reversing before striking Rapp, are expected to factor into the ongoing investigation and the manslaughter charge filed against Medina. Authorities have not released additional details regarding a potential motive or the specific sequence of events leading up to the crash beyond the initial account provided by the sheriff’s office.

Rapp’s death adds to a string of tragic losses within combat sports and the broader Texas cycling community, where bicyclist fatalities involving motor vehicles have remained a persistent public safety concern across the state in recent years. Advocacy groups and local news outlets in Texas have periodically tracked such incidents, though Saturday’s crash carries added weight within the boxing world given Rapp’s rising profile following her championship bout just weeks earlier.

Rapp’s transition from collegiate track athlete to professional boxer reflected a path increasingly common among fighters entering the sport later in their athletic careers, often bringing conditioning and competitive experience from other disciplines. Her willingness to maintain a full-time job in fire and life safety inspection while pursuing a professional boxing career also drew attention within the sport, illustrating the financial realities many fighters face even while competing at a championship level.

Tributes to Rapp continued to circulate across social media and combat sports outlets following news of her death, with fans and fellow fighters recalling both her performance against Brown in June and her broader reputation within the boxing community as a determined and well-liked competitor. Her death was first widely reported by ESPN boxing writer Andreas Hale early Saturday, drawing immediate reaction from figures across the sport, including Sulaiman’s statement on behalf of the WBC.

No additional public statements had been issued as of Saturday by Most Valuable Promotions, Rapp’s promotional company, or by Texas A&M University regarding her death. Funeral and memorial arrangements had not yet been announced.

Rapp’s death leaves the women’s featherweight division mourning the loss of one of its promising young contenders just weeks after she competed for its top title. Her professional career, though brief, included a notable championship-level performance that earned respect from her opponent and drew praise from boxing’s governing bodies, a legacy that fighters and fans within the sport are now working to honor in the wake of her sudden death.

As Canadian wildfire smoke continued to blanket a wide swath of the United States on Friday, from the Midwest to the East Coast, many Americans found themselves asking a simple but important question: is it safe to run the air conditioner when the outside air is unhealthy to breathe?

Environmental Protection Agency officials are urging residents in affected areas to take several protective steps, including using a portable air cleaner or high-efficiency HVAC filter, wearing N95 respirator masks when outdoors, and properly adjusting HVAC systems and air conditioners to limit how much outside air enters the home.

Dr. Brian Christman, a professor of medicine at Vanderbilt University, told Nexstar’s WJW that running an air conditioner during smoky conditions is generally safe, as long as it is set up correctly. Most standard air conditioning units work by cooling and recirculating the air already inside a home rather than pulling in fresh air from outside, making them relatively safe to run during smoke events. However, Christman cautioned that units equipped with a fresh air intake function should avoid using that specific setting while smoke levels remain elevated. “I wouldn’t spend a lot of time outside,” Christman said. “I would try to set your air conditioning on recirculate so that you’re not breathing in as much of the outdoor air, and if you have good level filters on your air conditioner, make sure that they’re in place and that you’re using them.”

The EPA has outlined several additional steps residents can take to keep indoor air as clean as possible during periods of heavy wildfire smoke. Homeowners are advised to check whether their system has a fresh air intake mode and, if so, switch it to “recirculate” rather than allowing outside air to enter. The agency also recommends ensuring HVAC filters are in good condition and considering an upgrade to a MERV 13 or higher-rated filter if the system can accommodate one, since higher-rated filters are more effective at capturing the fine particulate matter found in wildfire smoke.

Evaporative coolers, sometimes known as swamp coolers, should generally be avoided during smoky conditions, according to the EPA, since these systems work by pulling in and cooling outside air, which can actually draw more smoke into a home rather than filtering it out. Fans and traditional window air conditioning units are considered safer alternatives during smoke events. For those using window units specifically, the EPA recommends ensuring a tight seal between the unit and the window frame, and closing the outdoor air damper if the unit has one. If the damper cannot be closed, using a fan inside the home instead is recommended as a safer option.

Portable air conditioners that vent through a single hose out of a window should not be used during smoky conditions, the EPA warns, since these units can actually pull additional smoke into the home through gaps around the venting hose. A window air conditioning unit or a standard fan are considered better options in that scenario.

Air quality readings reached hazardous levels across multiple U.S. cities as of Friday afternoon, according to data from AirNow, the government’s air quality monitoring service. The worst readings recorded were in Toledo, Ohio, at 489; Grand Rapids, Michigan, at 440; north central Minnesota, also at 440; Spokane, Washington, at 439; the Duluth area of Minnesota, at 411; Kalamazoo, Michigan, at 403; Northwoods West, Wisconsin, at 402; the Milwaukee-Ozaukee area of Wisconsin, at 389; Dayton, Ohio, at 387; and South Bend, Indiana, at 383.

The Air Quality Index measures pollution levels on a color-coded scale ranging from 0 to 500 or higher. A reading of 0 to 50, coded green, is considered good with little to no health risk. Yellow, spanning 51 to 100, indicates moderate air quality. Orange, from 101 to 150, is considered unhealthy for sensitive groups such as children, older adults and people with existing respiratory conditions. Red, spanning 151 to 200, is classified as unhealthy for the general public. Purple, from 201 to 300, is considered very unhealthy, and maroon, covering any reading of 301 or higher, is classified as hazardous, the most severe category on the scale. Several of Friday’s readings, including those in Toledo, Grand Rapids and north central Minnesota, fell well within that hazardous maroon range.

The health consequences of prolonged wildfire smoke exposure extend well beyond short-term discomfort. A study published earlier this year found that long-term exposure to the fine particulate matter present in wildfire smoke contributes to an estimated 24,100 deaths annually across the lower 48 states. Health officials say long-term exposure can worsen existing medical conditions and contribute to a range of chronic and potentially fatal health issues, including respiratory illness, cardiovascular disease, neurological problems and premature death.

Looking ahead, National Weather Service meteorologist Jake Petr said that even as winds from the northwest are expected to help clear skies in some regions later this week, smoky conditions could continue returning intermittently until the underlying wildfires themselves are extinguished. Officials have said that full containment of the fires driving this summer’s smoke events may not occur until months from now, when snowfall arrives in Canada and northern Minnesota later in the year, a timeline that suggests residents across the affected regions should be prepared for recurring smoke events well into the fall.

In the meantime, health officials continue to emphasize that the most effective protective measures remain relatively simple: limiting time spent outdoors during periods of poor air quality, keeping windows and doors closed, running air conditioning systems on recirculate mode rather than drawing in outside air, using properly rated air filters, and wearing an N95 mask when outdoor exposure is unavoidable. For households without central air conditioning or window units capable of proper sealing, portable air purifiers equipped with high-efficiency particulate air, or HEPA, filters offer an additional layer of protection for maintaining cleaner indoor air during extended smoke events.

With Canadian wildfires expected to continue burning for months and weather patterns remaining a major factor in determining which parts of the country experience the worst smoke on any given day, officials are urging residents across the affected regions to stay informed through local air quality alerts and to adjust their daily routines, including their use of air conditioning and ventilation systems, based on current conditions rather than assuming smoke exposure has fully passed once visible haze clears from a particular area.