Monday’s heat advisory is set to expire at 8 p.m. The advisory cautioned heat index values of up to 109 degrees.

Temperatures climbed into the low to mid-90s in the afternoon, and it will feel like between 105-109 degrees, ABC7 Chicago AccuWeather Meteorologist Mark McGinnis said. But the heat is not stopping from coming to enjoy Monday night's Summer Series concert at Millennium Park.

Extreme heat is expected to hit the Chicago area again this week, and some felt the sweltering, humid temperatures on Sunday afternoon. The Chicago Office of Emergency Management and Communications pushed out a heat advisory Sunday afternoon, which the office said will last until Monday evening.