The National Weather Service has placed Evansville and huge swaths of the Tri-State under an "extreme heat watch" for Monday and Tuesday.

SOUTH GEORGIA (WALB)—The National Weather Service (NWS) has issued an extreme heat watch and a heat advisory for most of South Georgia on Sunday, July 27. The NWS has issued an extreme heat watch from noon until 7 p.m. this evening as heat index values of up to 115 are expected:

Columbia faces oppressive humidity Sunday with heat index values up to 112 degrees and an Extreme Heat Watch already issued for a hotter Monday.

Heat advisory issued for Northeast Florida & Southeast Georgia with heat indices up to 112 degrees; extreme heat watch follows for Monday.

SUNDAY: Heat Advisory continues with highs 90-95, and feels like temps as high as 105. A few PM t-storms are possible. SUNDAY NIGHT: Partly cloudy, warm and very humid. Lows in the mid to upper

On Wednesday at 1:41 p.m. the National Weather Service issued an extreme heat watch valid for Friday between 10 a.m. and 8 p.m. for Eastern Montgomery and Lower Bucks as well as Delaware and Philadelphia counties.

RALEIGH, N.C. (WTVD) -- Dangerous heat is returning to Central NC this weekend, marking the fourth heat wave of the year. It's expected to last through at least the middle of next week. With high temperatures in the 90s and near 100, combined with high humidity, the heat index could reach a dangerous 105 to 115 degrees.

The National Weather Service has issued an extreme heat watch, warning that as temperatures rise into the 90s, heat indices could eclipse 105 degrees.