MACON COUNTY— A heat advisory is effective in Macon County and surrounding counties from 11 a.m. to 7 p.m. Wednesday, the National Weather Service at Lincoln said.
The weather service said the heat index will reach values up to 104 degrees with 88 percent humidity. The National Weather Service at Lincoln advises people drink plenty of water, wear light weight and light colored clothing, stay in air-conditioned facilities and stay out of the sun.
"Car interiors can reach lethal temperatures in a matter of minutes," the weather service said. "Never leave pets, children or the elderly unattended in parked vehicles."
Hot/humid conditions are expected today. Temps in the low 90s will combine with dewpoints in the mid 70s to produce heat index values around 105. Temps inside a vehicle can reach well over 100 degrees in minutes. NEVER leave children or pets unattended in vehicles. pic.twitter.com/AJiExBjROk— NWS Lincoln IL (@NWSLincolnIL) July 10, 2019
As a cold front moves in, temperatures will drop to 67 degrees tonight, the weather service said.
A cold front will move across the area today & bring scattered storms this afternoon & evening. There is a marginal risk that some of the storms could be strong to severe with hail up to an inch & isolated gusts up to 60 mph. Intense lightning will also be a threat. #ILwx pic.twitter.com/ITqEhqyPzx— NWS Lincoln IL (@NWSLincolnIL) July 10, 2019
There is a 40 percent chance of showers and thunderstorms after 2 p.m. and before 10 p.m., according to the National Weather Service at Lincoln.