* WHAT. Dangerously hot conditions with heat index values up to 101 expected. * WHERE. Genesee, Macomb, Oakland, and Wayne Counties. * WHEN. Until 8 PM EDT Friday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Heat index values up to 100 expected. * WHERE. A portion of southeast Michigan. * WHEN. Until 8 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values of 100 to 104 degrees are expected at times this week with variability each day due to clouds and scattered showers and storms, especially early in the week. * WHERE. Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN. Until 8 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

The Michigan Department of Environmental Quality has issued an Air Quality Advisory for Monday June 17, for elevated levels of ozone. Pollutants are expected to be in the Unhealthy for Sensitive Groups range. The alert is in effect for the following Michigan Counties, Wayne, Washtenaw, Macomb, Oakland, Livingston, St. Clair, and Monroe. It is recommended that, when possible, you avoid strenuous outdoor activities, especially those with respiratory diseases such as asthma. People and businesses are urged to avoid activities which lead to ozone formation. These activities include, refueling vehicles or topping off when refueling, using gasoline powered lawn equipment, and using charcoal lighter fluid. Positive activities include, driving less, telecommuting, walking or biking, delaying or combining errands and using water-based paints. For further information, please see EPA's Air Now site for up-to- date air quality data at https://www.airnow.gov.