No relief from the heat as many US cities will see record overnight temperatures

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.

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.

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.

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.

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.

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.

A couple stand in the shade near the Detroit River to avoid the heat Monday, July 13, 2026, in Detroit. (AP Photo/Paul Sancya)

Paddleboarders pause while paddling on Lake of the Isles during an extreme heat warning, Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

Jack Scheck, of Minneapolis, lays in the sand after a run during an extreme heat warning, Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

A swimmer dives into Cedar Lake during an extreme heat warning Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

A motorist gestures while driving on West Lake Street during an extreme heat warning Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

A work crew resurfaces the wading pool at Bryant Square Park during an extreme heat warning Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

Simone Mosley waits for their rideshare in shade at a bus stop during an extreme heat warning Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

The sun beams down on a lifeguard while she watches over a beach at Lake Harriet during an extreme heat warning, Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

A woman sits in the shade to avoid the heat Monday, July 13, 2026, in Detroit. (AP Photo/Paul Sancya)

A motorist gestures while driving on West Lake Street during an extreme heat warning Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

Neighborhood resident Yusuf Usim sits in the shade at Peavey Park during an extreme heat warning Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

A work crew resurfaces the wading pool at Bryant Square Park during an extreme heat warning Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

Simone Mosley waits for their rideshare in shade at a bus stop during an extreme heat warning Monday, July 13, 2026, in Minneapolis. (AP Photo/Ellen Schmidt)

MADISON, Wis. (AP) — Wisconsin Democratic candidate for governor Sara Rodriguez said Monday that she discovered her campaign has hundreds of thousands dollars less cash than she thought after campaign ads slated to run last week did not air because of unpaid invoices.

Rodriguez, the current lieutenant governor, announced late Sunday night that she had fired her campaign manager just a month before the Aug. 11 primary after discovering contributions had been double counted and expenses were undercounted, leading to her campaign having far less money than she thought.

Rodriguez, at a news conference surrounded by supporters, vowed to remain in the race while calling the issue a “bump in the road.”

“This campaign is going to move forward," she said in the appearance at her campaign headquarters.

Rodriguez is in a competitive primary for Wisconsin’s open governor’s race against democratic socialist Francesca Hong; former Lt. Gov. Mandela Barnes; state Sen. Kelda Roys and Joel Brennan, a former top aide to Gov. Tony Evers. Evers has not endorsed anyone in the primary.

The winner of the primary will advance to the general election against Republican Rep. Tom Tiffany, who faces only token primary opposition.

Barnes' campaign manager Darby O’Connor said a mistake like this is “unheard of in professional politics” and said "a campaign this poorly mismanaged stands no chance against Tom Tiffany this fall.”

Hong said in a statement that she was focused on her campaign, but "it’s vital that everyone running for this position is creating a standard of trust, honesty and accountability.”

Brennan called the errors by Rodriguez’s campaign “disqualifying.”

Roys spokesperson Jalen Knuteson said the issue contributed to a pattern showing that "Rodriguez is unprepared for the rigors of a general election or governing.”

Last week Rodriguez announced a $1 million television ad campaign buy. But when the ads didn't start running as expected, she said she began asking questions and discovered the problems in the campaign reports.

“I am hurt, angry and deeply disappointed by someone I trusted to run my campaign,” Rodriguez said of her fired campaign manager, Kara Spencer. “I was continually getting inaccurate reports from my campaign manager.”

Spencer did not return a message seeking comment.

Rodriguez's next report covering money raised and spent over the first six months of the year is due on Wednesday.

Rodriguez said her campaign immediately notified the Wisconsin Ethics Commission on Monday and was working with them to correct the report filed in January that covers donations and expenditures made last year.

The $618,000 she reported raising in 2025 was the second highest of any Democratic candidate, behind only Milwaukee County Executive David Crowley who brought in about $800,000. Crowley dropped out of the race last week and endorsed Rodriguez after she announced a $1 million campaign TV ad buy.

Another former Democratic candidate, former state economic development director Missy Hughes, endorsed Rodriguez after she ended her campaign last month.

Rodriguez said the ads that were supposed to start last week would begin airing next week. She would not say exactly how much her filing was off by because the work to reconcile the books was ongoing. But she said her campaign had raised about $1 million and had about $200,000 cash on hand.

Rodriguez said she was being up front about what happened.

“If I were trying to hide something I would be here today telling you about it," she said at the news conference. “Most people are not going to stand in front of this many cameras and microphones to talk about fixing an error.”

Democratic candidate for Wisconsin governor Sara Rodriguez speaks to supporters, Monday, July 13, 2026, in Madison, Wis. (AP Photo/Scott Bauer)