An Excessive Heat Watch has been issued for Portions of northern Indiana, southwest Michigan and northwest Ohio on August 27

The weather event onset is forecast for 11:00 AM (EDT) with dangerously hot conditions with heat index values around or greater than 105.

These conditions are expected from Tuesday morning through Tuesday evening.

Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

There is still potential for shower and thunderstorm activity to limit high temperatures. Warm and humid conditions overnight with lows in the 70s will make it harder for people to recover from impacts of heat during the day, particularly for those without air conditioning.