Weather alert: Heat advisory issued — and it could feel like 108 in Miami

The National Weather Service has issued a heat advisory for Miami-Dade and Broward counties for the third straight day this week.

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Wednesday’s advisory is in effect from noon to 6 p.m., with feels-like temperatures up to 108 degrees.

The region also was under heat advisories on Monday and Tuesday.

The weather service warns that “hot temperatures and high humidity may cause heat illnesses.”

“It is already warm and steamy out there,” Lissette Gonzalez, a meteorologist at Miami Herald news partner CBS News Miami, said Wednesday morning.

South Florida felt like the 90s at 5 a.m., she said. Peak heat in South Florida is expected around 2 p.m.

On Monday, the Miami-Dade County Homeless Trust activated an emergency outreach plan. In partnership with county government, teams wearing red “Heat Alert” T-shirts planned to fan out into communities to let people know about the advisory and hand out cool-down supplies including water and ice packs.

While the heat index is expected to reach the triple figures again on Wednesday, the actual forecast high in Miami is 92, dropping to 81 at night, with a 10% chance of thunderstorms before 8 p.m., according to the National Weather Service.

“We’re dealing with major hit risk,” said Gonzalez, who added that Tuesday’s 95-degree air temperature tied a Miami record.

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What is a heat advisory?

The National Weather Service in Miami issues a heat advisory if the heat index is 105 degrees for at least a couple of hours. Before 2023, the weather service issued a heat advisory when the heat index hit 108 degrees. The goal is to spread awareness so that people protect themselves from extreme heat that leads to more than 30 deaths and hundreds of hospitalizations every year, according to county estimates.

What is the heat index?

The heat index is a measure of how hot it really feels when relative humidity is factored in with the actual air temperature, according to the weather service. This is how hot it “feels like” on your skin on steamy days.

How can you prevent heat illness?

Miami-Dade County has issued several hot weather survival tips, based on U.S. Centers for Disease Control and Prevention advice, and noted who is most at risk:

Who is most at risk of heat-related illnesses:

Older adults 65 and older, young children, people with chronic health conditions or mental illness, athletes who exercise outdoors, outdoor workers, people living unsheltered or with limited access to air conditioning, pregnant people, and pets.

What you should do:

▪ Stay cool by spending time in air-conditioned buildings.

▪ Avoid direct contact with the sun.

▪ Reduce physical activity and move to shaded areas.

▪ Do outdoor activities in the cooler morning or evening hours, and dampening your shirt or wrapping a wet scarf or bandana around your neck or forehead could also help.

▪ Stay hydrated and drink plenty of water or drinks with electrolytes if you’re sweating. Don’t wait until you’re thirsty to drink more. Use sunscreen, too, to protect against skin damage.

▪ Limit or avoid dehydrating caffeine and alcohol.

▪ Never leave infants, children or pets in a parked car, even if the windows are cracked open.

▪ Watch for signs of heat exhaustion or heat stroke. Seek medical care immediately if you know someone who experiences symptoms that could include high body temperature, headache, dizziness or nausea and confusion.

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This story was originally published June 17, 2026 at 5:12 AM.