* WHAT. Dangerously hot conditions with heat index values up to 100 possible. * WHERE. Portions of east central and southeast Indiana and central, south central, southwest, and west central Ohio. * WHEN. From Monday afternoon through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events, particularly for those working or participating in outdoor activities.

* WHAT. Dangerously hot conditions with heat index values up to 101 possible. * WHERE. Portions of east central and southeast Indiana and central, south central, southwest, and west central Ohio. * WHEN. From Monday afternoon through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events, particularly for those working or participating in outdoor activities.

* WHAT. Dangerously hot conditions with heat index values up to 102 possible. * WHERE. Portions of northeast Kentucky, southeast Ohio, and central, northeast, northern, southern, and western West Virginia. * WHEN. From Monday morning through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Prolonged dangerously hot conditions with heat index values in excess of 100 degrees possible. * WHERE. Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN. From Monday morning through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Dangerously hot conditions with heat index values up to 104 possible. * WHERE. Portions of east central Ohio, northwest, southwest, and western Pennsylvania, and northern and the northern panhandle of West Virginia. * WHEN. From Monday morning through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

The Mid-Ohio Regional Planning Commission has issued an Air Quality Alert for Central Ohio, from 6 AM this morning to 10 PM EDT this evening. Levels of ozone within the region may approach or exceed unhealthy standards. On Alert days, help reduce ozone by taking the following actions: * Carpool, if possible, bike, walk or take the bus instead of driving alone. * Refuel your vehicle after 8 pm. * Do not idle your vehicle, exhaust contributes to air pollution. * Mow your lawn in the evening hours and avoid the use of gas-powered lawn equipment. For additional information, please visit the Mid-Ohio Regional Planning Commission's website at morpc.org/airquality

The Miami Valley Regional Planning Commission and the Regional Air Pollution Control Agency have issued an Air Quality Alert for Montgomery, Miami, Greene, Clark, Preble and Darke counties in the Miami Valley Region, until midnight EDT Monday night. Levels of ozone within the region may approach or exceed unhealthy standards. On Alert days, help reduce ozone by taking the following actions: * Carpool, if possible, bike, walk or take the bus instead of driving alone. * Refuel your vehicle after 8 pm. * Do not idle your vehicle, exhaust contributes to air pollution. * Mow your lawn in the evening hours and avoid the use of gas-powered lawn equipment. For additional actions and information, visit miamivalleyair.org or call 937-223-6323