The National Weather Service in Charleston has issued a heat advisory from noon to 7 p.m. today.
Temperatures are expected to climb into the low 90s, and humidity is expected to remain high, producing heat indexes between 105 and 110 degrees across Southeast Georgia and Southeast Carolina.
Scattered showers and thunderstorms are expected to develop in the mid- to late afternoon, which could provide some relief.
During a heat advisory, drink plenty of liquids, and stay out of the sun and in air conditioned areas as much as possible. Remember to check on the elderly and pets.
Monday's forecast calls for a high of 89 degrees and a 30 percent chance of showers, with heat indexes projected above 100 degrees, the weather service said.