Environment Canada has a heat warning in effect in those areas which could see humidex values between 37 C and 42 F. It could last through Tuesday or possibly Wednesday in some spots.

According to the alert issued Aug. 10, Keweenaw, Ontonagon, Houghton, Baraga, Marquette, Alger, Luce, Gogebic, Iron, Dickinson, Menominee, Delta and Schoolcraft counties should expect elevated levels ...