How to stay cool in a heat wave — even without air conditioning

Climate change has been exacerbating heat waves, and the problem isn't going away anytime soon. An increasingly hot planet — due largely to burning fossil fuels such as coal, oil and natural gas — means already hot regions are getting worse.

Heat doesn't just mean canceled events. It also poses a health risk, especially for children, older people and those with certain health conditions.

So here are some tips to stay safe.

The answer depends on more than the temperature. The most detailed measurement is called the wet bulb globe temperature (WBGT), which includes temperature, humidity, cloud cover and wind. The heat index, which measures temperature and humidity, is less descriptive but easier to find on weather apps. Both explain why a shaded soccer field on a 90 degree F day (32 degree C) in arid Phoenix may be less risky than an exposed park on an 80 degree F (27 degree C) day in soupy Little Rock.

Just based on heat index, NOAA has a chart that calculates how dangerous prolonged exposure can be. For example, a day where temperatures reach 96 degree F (36 degrees C) and 45% humidity would fall into the “danger” category for prolonged exposure or strenuous activity.

The WBGT threshold isn't exact, but recent research suggests that even some young, healthy people can't endure hours of exposure to high heat and humidity.

Overnight lows can be a particularly dangerous part of a heat wave, said Ashley Ward, director of the Heat Policy Innovation Hub at Duke University.

“Your body needs a reprieve,” she said. “You don't get that overnight, we start the next day at a deficit.” Heat can worsen labor productivity and lead to more visits to the emergency room.

“When we have overnight temperatures that don't drop below 75 degrees" F (24 degrees C), she said, “you start to see some pretty extraordinary outcomes with respect to heat illness and heat stroke, and even mortality.”

Ward's answer: Find air conditioning. That might be at home, but she said census data overcounts how many people have access.

If you can't afford to cool the whole house, Ward said, create a “cool corner" and sleep there, so your body is prepared to tackle the next day.

Evaporative or “swamp” coolers can help in dry heat, but they increase humidity and can make it more difficult to cool down. In humid places, just use a fan.

If you don't have air conditioning, find public places that do, including movie theaters, malls and libraries. Some communities set up cooling centers.

Depending on where you live, the Low-Income Home Energy Assistance Program can help you buy a window air conditioning unit, according to the National Council on Aging. Some local nonprofits and civic organizations can also help you access one if cost is a burden.

Knowing what workplace protections you have is important. But there are no federal heat rules to protect workers in the United States.

Some states have them, including Washington, Oregon, California, Nevada, Colorado, Minnesota and Maryland, according to the Natural Resources Defense Council. Other states don't have any.

If your state has work rules, try to learn them — though there are still challenges to ensuring regulations are actually enforced, said Bharat Venkat, director of the University of California, Los Angeles Heat Lab.

He notes that sometimes shaded areas are too far for workers to take breaks without losing wages, or that management can make it impossible for workers to advocate for themselves. “Most workers don’t actually have control over their time or control over where they work," he said.

Within those constraints, finding ways to stay hydrated and lower your body temperature are paramount. You can do this by drinking lots of fluids, wetting clothing or putting cold water or a cold rag on your hands, feet, armpits and neck. A portable handheld fan or a cooling vest can also help.

If you're exercising, avoid the hottest times of day and bring more water than you think you need.

Heat illness symptoms can vary by person, Venkat said. Medications or underlying conditions can also make it harder to regulate body temperature or notice you're getting too hot.

Early trouble signs include heavy sweating, muscle cramps and headache. That's when you stop what you're doing and cool yourself off — for example, by splashing yourself with cold water or finding an air conditioned space.

As heat exhaustion sets in, new symptoms arrive, including faster heart rate and dizziness. Next comes heat stroke, which can include confusion, slurred words and fainting. Ward said that's when to call 911.

“Don’t be embarrassed to call 911 or go to urgent care when you think you might have overdone it in the heat,” he said.

Walling reported from Chicago. Wells reported from Cleveland.

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Robby, 12, who did not want to give his last name, sells lemonade in his front yard on a hot Friday, June 20, 2025, in Chicago. (AP Photo/Erin Hooley)

A man runs past a fountain as temperatures approach 100 degrees, Friday, June 20, 2025, in Kansas City, Mo. (AP Photo/Charlie Riedel)

Kids cool off in the mist from a fountain as temperatures approach 100 degrees, Friday, June 20, 2025, in Kansas City, Mo. (AP Photo/Charlie Riedel)

FILE - Mirabelle Demske, second from left, uses a portable electric fan to cool off her friends Faith Hamzy, center, and Annie Sayre, second from right, June 20, 2024, at YMCA Camp Kern in Oregonia, Ohio. (AP Photo/Joshua A. Bickel, File)

FILE - Tony Berastegui Jr., right, and his sister Giselle Berastegui drink water, July 17, 2023, in Phoenix. (AP Photo/Ross D. Franklin, File)

ORCHARD PARK, N.Y. (AP) — Buffalo Bills fans arrived early and lingered long after the game ended to bid what could be farewell to their long-time home stadium filled with 53 years of memories — and often piles of snow.

After singing along together to The Killers' “Mr. Brightside” in the closing minutes of a 35-8 victory against the New York Jets, most everyone in the crowd of 70,944 remained in their seats to bask in the glow of fireworks as Louis Armstrong's "What A Wonderful World” played over the stadium speakers.

Several players stopped in the end zone to watch a retrospective video, with the Buffalo-based Goo Goo Dolls’ “Iris” as the soundtrack while fans recorded selfie videos of the celebratory scene. Offensive lineman Alec Anderson even jumped into the crowd to pose for pictures before leaving the field.

With the Bills (12-5), the AFC's 6th seed, opening the playoffs at Jacksonville in the wild-card round next week, there's but a slim chance they'll play at their old home again. Next season, Buffalo is set to move into its new $1.2 billion facility being built across the street.

The farewell game evoked “a lifetime of memories,” said Therese Forton-Barnes, selected the team’s Fan of the Year, before the Bills kicked of their regular-season finale. “In our culture that we know and love, we can bond together from that experience. Our love for this team, our love for this city, have branched from those roots.”

Forton-Barnes, a past president of the Greater Buffalo Sports Hall of Fame, attended Bills games as a child at the old War Memorial Stadium in downtown Buffalo, colloquially known as “The Rockpile.” She has been a season ticket holder since Jim Kelly joined the Bills in 1986 at what was then Rich Stadium, later renamed for the team’s founding owner Ralph Wilson, and then corporate sponsors New Era and Highmark.

“I’ve been to over 350 games,” she said. “Today we’re here to cherish and celebrate the past, present and future. We have so many memories that you can’t erase at Rich Stadium, The Ralph, and now Highmark. Forever we will hold these memories when we move across the street.”

There was a celebratory mood to the day, with fans arriving early. Cars lined Abbott Road some 90 minutes before the stadium lots opened for a game the Bills rested most of their starters, with a brisk wind blowing in off of nearby Lake Erie and with temperatures dipping into the low 20s.

And most were in their seats when Bills owner Terry Pegula thanked fans and stadium workers in a pregame address.

With Buffalo leading 21-0 at halftime, many fans stayed in their seats as Kelly and fellow Pro Football Hall of Famer Andre Reed addressed them from the field, and the team played a video message from 100-year-old Hall of Fame coach Marv Levy.

“The fans have been unbelievable,” said Jack Hofstetter, a ticket-taker since the stadium opened in 1973 who was presented with Super Bowl tickets before Sunday’s game by Highmark Blue Cross Blue Shield. “I was a kid making 8 bucks a game back in those days. I got to see all the sports, ushering in the stadium and taking tickets later on. All the memories, it’s been fantastic.”

Bud Light commemorated the stadium finale and Bills fan culture with the release of a special-edition beer brewed with melted snow shoveled out of the stadium earlier this season.

In what has become a winter tradition at the stadium, fans were hired to clear the stands after a lake-effect storm dropped more than a foot of snow on the region this week.

The few remaining shovelers were still present clearing the pathways and end zone stands of snow some five hours before kickoff. The new stadium won’t require as many shovelers, with the field heated and with more than two-thirds of the 60,000-plus seats covered by a curved roof overhang.

Fears of fans rushing the field were abated with large contingent of security personnel and backed by New York State troopers began lining the field during the final 2-minute warning.

Fans stayed in the stands, singing along to the music, with many lingering to take one last glimpse inside the stadium where the scoreboard broadcast one last message:

“Thank You, Bills Mafia.”

AP Sports Writer John Wawrow contributed.

AP NFL: https://apnews.com/hub/nfl

Fans watch a ceremony after the Buffalo Bills beat the New York Jets in the Bills' final regular-season NFL football home game in Highmark Stadium Sunday, Jan. 4, 2026, in Orchard Park, N.Y. (AP Photo/Adrian Kraus)

Buffalo Bills cornerback Tre'Davious White (27) remains on the field to watch a tribute video after the Bills beat the New York Jets in the Bills' final regular-season NFL football home game in Highmark Stadium Sunday, Jan. 4, 2026, in Orchard Park, N.Y.(AP Photo/Adrian Kraus)

Fans watch a ceremony after the Buffalo Bills beat the New York Jets in the Bills' final regular-season NFL football home game in Highmark Stadium Sunday, Jan. 4, 2026, in Orchard Park, N.Y. (AP Photo/Adrian Kraus)

Fans celebrate after the Buffalo Bills scored a touchdown during the first half of an NFL football game against the New York Jets, Sunday, Jan. 4, 2026, in Orchard Park, N.Y. (AP Photo/Carolyn Kaster)

Fans celebrate and throw snow in the stands after an NFL football game between the Buffalo Bills and the New York Jets, Sunday, Jan. 4, 2026, in Orchard Park, N.Y. (AP Photo/Carolyn Kaster)

Aga Deters, right, and her husband Fred Deters, walk near Highmark Stadium before an NFL football game between the Buffalo Bills and the New York Jets, Sunday, Jan. 4, 2026, in Orchard Park, N.Y. (AP Photo/Carolyn Kaster)

Michael Wygant shoves snow from a tunnel before an NFL football game between the Buffalo Bills and the New York Jets at Highmark Stadium, Sunday, Jan. 4, 2026, in Orchard Park, N.Y. (AP Photo/Carolyn Kaster)

Buffalo Bills offensive tackle Alec Anderson (70) spikes the ball after running back Ty Johnson scored a touchdown against the New York Jets in the first half of an NFL football game Sunday, Jan. 4, 2026, in Orchard Park, N.Y. (AP Photo/Seth Wenig)

FILE - The existing Highmark Stadium, foreground, frames the construction on the new Highmark Stadium, upper right, which is scheduled to open with the 2026 season, shown before an NFL football game between the Buffalo Bills and the New England Patriots, Oct. 5, 2025, in Orchard Park, N.Y. (AP Photo/Gene J. Puskar, File)

Salt crew member Jim Earl sprinkles salt in the upper deck before an NFL football game between the Buffalo Bills and the New York Jets at Highmark Stadium, Sunday, Jan. 4, 2026, in Orchard Park, N.Y. (AP Photo/Carolyn Kaster)