No relief from the heat as many US cities will see record overnight
temperatures
[July 14, 2026]
By JOHN SEEWER
Another week of blistering heat will bring even more health risks in the
coming days, as overnight temperatures won't provide much relief.
The National Weather Service is predicting that more than 90 temperature
records across the U.S. will be tied or broken this week through
Wednesday — and most of those will be overnight heat records.
Health experts say overnight temperatures that fail to cool down are
even more dangerous than daytime temperatures that soar.
It has already been a sweltering start to the summer across much of the
U.S. due to the long-lasting heat dome expected to blanket much of the
country this week. The blistering temperatures over the past few weeks
have caused heat-related deaths in New Jersey and helped fuel wildfires
in the West.
No relief from the heat at night this week
Temperatures were not forecast to drop below 80 F (27 C) at night in
Fort Lauderdale, Florida; Miami; Tampa, Florida; Galveston, Texas; and
Charleston, South Carolina, the National Weather Service said.
Over the next few days, places in the Midwest and Northeast known for
frigid winters will see nighttime temperatures remain above 70 F (21 C),
including Fargo, North Dakota; International Falls, Minnesota; and
Portland, Maine.
Hot temperatures at night pose a bigger danger
Health experts say that high overnight temperatures are particularly
dangerous because there's no time for the body's core temperature to
cool down and recover from daytime heat.
“That’s where the health outcomes are amplified, particularly for the
elderly and vulnerable communities,” said University of Georgia
meteorology professor Marshall Shepherd.
Just a few degrees of increased body temperature can lead to heatstroke
or put too much strain on the heart.
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A woman sits in the shade to avoid the heat Monday, July 13, 2026,
in Detroit. (AP Photo/Paul Sancya)
Dangers of heat can sneak up on you
If temperatures at night don't cool down your body, the health risks
more often show up the next day, said Kristie Ebi, a public health
and climate scientist at the University of Washington.
“Mortality starts the second or third day" because the body's unable
to cool, she said on Monday.
Being proactive is crucial during a heat wave
Early warning signs include heavy sweating, muscle cramps and
headache. “It’s hard to know you’re getting in trouble with the
heat. This is why we need to be more proactive," Ebi said.
It's important to find a way to cool off, whether stepping into air
conditioning or wrapping a cold towel around your neck.
And health experts say don't forget to check in on friends and
family members, especially those who are older, pregnant or who have
health challenges that might make it more difficult to handle the
heat.
How to beat the heat without air conditioning
Even without air conditioning at home, there are ways to find
relief.
Stop by a library or a mall. Sit in front of a fan and spray water
on your skin. Put your feet in cold water. Soak your clothes in
water. And of course, drink plenty of water.
___
Associated Press reporter Seth Borenstein in Washington contributed.
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