Cities along Florida’s east coast, all the way from Key West to Jacksonville, could see near-record or record-breaking temperatures May 7, with "major" to "extreme" heat possible in parts of South Florida over the weekend.

"The main reason we are seeing such strong heat signals is there will be no overnight relief," said Miami-based National Weather Service meteorologist Nico Porcelli. "The overnight temperatures are going to stay pretty warm in the upper 70s and even some that will hit 80."

Inland areas of Palm Beach, Broward and Miami-Dade counties could see temperatures through the weekend climb into the mid-90s. An extreme heat risk, which is the highest level on a 4-tier scale, is possible Sunday and Monday from Palm Beach Gardens and into areas west of Miami, according to the NWS.

Meanwhile, on May 7, Jacksonville could reach 95 degrees, 11 degrees warmer than normal and a record for a weather gauge north of downtown with a 155-year history. Orlando, Melbourne, Sanford and Key West are also forecast to see record heat on Thursday, according to the Southeast Regional Climate Center. West Palm Beach, Fort Lauderdale, Daytona Beach and Vero Beach could hit temperatures in their top five warmest.

In Miami and Fort Lauderdale, highs could reach 89 degrees on May 7, according to the NWS, while Homestead could see a high of 91.

Miami, Fort Lauderdale and West Palm Beach all broke record highs on May 2. Miami’s daytime high of 94 degrees broke a 1937 record of 93. West Palm Beach hit 96 degrees, which is 2 degrees warmer than the previous record set in 1929.

The NWS recommends:

Hydrating before you’re thirsty

Staying in a cool place, especially during the heat of the afternoon

Making use of air conditioning if it’s available, as fans and open windows “will not be enough”

Limiting outdoor activities between 10 a.m. and 4 p.m.

Sarah Perkel is a South Florida Connect Reporter for the USA TODAY Network's Florida Connect team. You can get all of Florida’s best content directly in your inbox each weekday day by signing up for the free newsletter, Florida TODAY.

This article originally appeared on USA TODAY: South Florida extreme heat, record temperatures forecast