* WHAT. Heat index values of 95 to 100 degrees expected. * WHERE. Portions of northern Indiana and southwest Michigan. * WHEN. Until 8 PM EDT /7 PM CDT/ Tuesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS. There is a chance that clouds linger from an overnight chance for showers and storms, which could limit how high heat indices get on Tuesday. However, should clouds scatter out, heat indices could rapidly rise quickly. Heat stress increases with the number of consecutive hot days. Heat indices will range from 93 to near 100 for the next five days, with high temperatures in the upper 80s and low to mid 90s. Low temperatures in the 70s at night will provide little relief from the heat. Monitor for additional heat headlines this week.

* WHAT. Heat index values around 100 degrees expected. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. Until 8 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

The Michigan Department of Environment, Great Lakes, and Energy (EGLE) has declared an Air Quality Advisory for Monday, June 17, for elevated levels of ozone in parts of southwest Michigan. Pollutants within those areas are expected to be in the Unhealthy for Sensitive Groups (USG, Orange AQI) range. The Air Quality Advisory is in effect for the following counties in southwest Michigan. Berrien and Cass Temperatures and humidity will continue to increase as we begin the new week. Temperatures in the 90's and dewpoints around 70 degrees will add to the misery index for the week. This pattern looks to persist through the week. With winds at all levels of the atmosphere coming from the hot southwest, Air Quality will certainly be an issue, this week. With conditions not expected to change, drink plenty of fluids, stay in an air-conditioned room, stay out of the sun as much as possible, and check up on relatives and neighbors. 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; * using charcoal lighter fluid. Positive activities include: * driving less; * telecommuting; * and delaying or combining errands. For further information, please see EPA's Air Now site for up-to- date air quality data: https://www.airnow.gov/

The Michigan Department of Environment, Great Lakes, and Energy (EGLE) has declared an Air Quality Advisory for Monday, June 17 for elevated levels of ozone in West Michigan. Pollutants within those areas are expected to be in the Unhealthy for Sensitive Groups (USG, Orange AQI) range. The Air Quality Advisory is in effect for the following Michigan counties: ALLEGAN. KENT. MUSKEGON. OCEANA OTTAWA MASON AND VAN BUREN COUNTIES 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 can lead to ozone formation. These activities include: refueling vehicles or topping off when refueling; using gasoline powered lawn equipment; using charcoal lighter fluid. Positive activities include: driving less; telecommuting; walking or bike riding; delaying or combining errands; using water-based paints. For further information, please see EPAs Air Now site for up-to-date air quality data: https://www.airnow.gov/