RICHMOND, Va. – The prolonged heat wave will continue to keep much of the Eastern United States in its grip Sunday, while a cold front that could lower temperatures in the middle of the country may be accompanied by thunderstorms that threaten flash floods.

The National Weather Service says the “oppressive and dangerous” heat wave will abate by Monday and Tuesday. The agency says a swath of the East Coast, from the Carolinas up to Maine, faces the greatest heat threat Sunday. Daytime highs are expected in the mid-to-upper 90s, which, coupled with high humidity, will feel like 100 to 110 degrees Fahrenheit (38 to 43 degrees Celsius).

Danville can expect another day of 100 degree weather. Cooling stations have opened at libraries in Pittsylvania County and health officials are warning residents to avoid prolonged exposure to the heat.

Temperatures in the Southside aren’t expected to drop until Tuesday, when the high will reach 82.