South Florida under July 4 Heat Advisory as storms loom

South Florida residents and visitors celebrating the Fourth of July should prepare for dangerous heat and afternoon thunderstorms before conditions improve in time for evening fireworks.

Read more Soft-spoken Malik Tillman delivers a loud statement with his bloody sock goal at the World Cup

A Heat Advisory is in effect from 11 a.m. to 8 p.m. Saturday for most of Palm Beach County, coastal Broward County and metro Miami-Dade County, according to the National Weather Service.

Local 10 meteorologist Jennifer Collins said Heat index values are expected to reach as high as 108 degrees, making it feel much hotter than the actual air temperature.

Collins said highs will climb into the low 90s under hot and humid conditions.

“If you’re planning any outdoor activities today, make sure you’re wearing light, loose-fitting clothing, staying hydrated too, and taking lots of breaks in the shade or AC, especially if you’re along our area beaches for today,” she said. “It’s going to feel quite hot.”

Scattered showers and thunderstorms are expected to develop during the afternoon as the sea breeze moves inland. Some storms could produce pockets of heavy rain, frequent lightning and strong wind gusts.

Read more This high-tech ball was involved in one of the most dramatic moments in World Cup history

The unsettled weather could briefly interrupt outdoor holiday plans, but Collins said storms are expected to diminish by the early evening, allowing skies to clear in time for many Fourth of July fireworks displays.

A similar weather pattern is expected Sunday, with highs in the low 90s and another round of afternoon showers and thunderstorms.

Looking ahead, South Florida’s day-to-day weather is expected to remain largely unchanged through early next week. Rain chances could decrease later in the week as Saharan dust moves into the region.

The tropics are expected to remain quiet through next week.

Track the latest forecast from Local 10’s Weather Authority team by clicking here.

Read more Puppy love as dog walker turns his pack of 13 into Argentina jersey-clad World Cup followers