With a projected high of 96 degrees today for Aberdeen, the National Weather Service has issued a heat advisory for much of eastern South Dakota.
Temperatures will be 95 or warmer today throughout most of the northeast corner of the state, so people need to do whatever they can to stay cool, said Ken Gillespie, meteorologist with the weather service office in Aberdeen.
The heat index is expected to climb above 100 due to the high humidity this afternoon, he said. As of 10 this morning, the temperature was 81 in Aberdeen.
There's a 20 percent chance of thunderstorms both today and tonight, according to the forecast.
People should stay indoors and take advantage of air conditioning if possible, Gillespie said. Anyone who has to work outdoors should wear light clothing, take frequent breaks and make sure to drink plenty of fluids to avoid dehydration, heat exhaustion and heat stroke, he said.
The heat advisory will be in effect until 7 p.m. in several counties, including Brown, Spink, Potter, McPherson, Edmunds and Faulk, according to the National Weather Service website.
A heat advisory means that there will be combination of high temperatures and high humidity that could lead to heat-related illnesses.
The extreme heat is only expected to last until tonight, Gillespie said. A cold front is projected to move through the region Friday, which should drop temperatures to the mid-80s, he said.