The service's Charleston office said the temperature, plus humidity will be dangerous from noon until 8 this evening. The chance of pop-up storms will last until 10 Tuesday evening.
A hot and humid airmass will persist over the area today. High temperatures in the mid to upper 90s combined with moderate humidity levels will produce heat index values of 105 to 110 degrees across portions of Southeast Georgia,.with the highest heat indices occurring between 1 and 7 pm.
Slightly cooler conditions can be expected at the beaches, although heat indices of 100 to 105 degrees will still occur.
The advisory means a period of very hot temperatures can be expected. The combination of heat and humidity will create a situation in which heat illnesses are possible. Residents and visitors are encouraged to drink plenty of fluids, stay out of the sunshine, check on the elderly and stay in an air conditioned location, if possible.
Providing an effective response to heat-related illness requires recognition of early warning signals and quick action to reduce their effects. Common early signs of the onset of a heat-related illness include headache, muscle cramps and unusual fatigue.
The chance for storms is exaggerated by a cool front moving through the area, pushing into the moist and unstable air. The most likely areas for the storms are along and south of I-16 in Southeast Georgia. Damaging winds up to 60 mph and small hail will be the primary hazards.