The National Weather Service has issued a heat advisory for much of eastern South Carolina.
The weather service says the warning about excessive heat will be in effect Monday from midday until early evening.
Forecasters say heat index values as high as 110 degrees are possible because of temperatures in the mid- to upper-90s and high humidity.
The advisory is in effect in Allendale, Berkeley, Colleton, Charleston, Dorchester, Florence, Georgetown, Hampton, Horry, Jasper, Marion and Williamsburg counties.
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It should be hot and mostly sunny on Monday, with a chance of strong thunderstorms this afternoon.
The thunderstorms could produce damaging winds, and are also possible Tuesday before a clearing trend.