* WHAT...Prolonged dangerously hot conditions with heat index values in excess of 100 degrees likely.

* WHERE...Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania.

* WHEN...From 11 AM this morning to 8 PM EDT Friday.

* IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

* WHAT...Prolonged dangerously hot conditions with heat index values in excess of 100 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.

An Air Quality Advisory for ground level ozone has been issued by the Northeast Ohio Areawide Coordinating Agency for Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Medina, Portage and Summit Counties.

The advisory is from midnight tonight to midnight Monday night.

Air quality levels will be unhealthy for sensitive groups during this period. If you are in the sensitive groups category of children, the elderly and those with breathing difficulties, please monitor your outdoor activity and check air quality readings at airnow.gov. Additionally, sign-up at enviroflash.info for text alerts regarding air quality.

To help our region reduce air pollution:

* Drive less: bike, walk, use transit, work from home, combine trips * Visit gohiocommute.com/noaca - Find a smarter way to travel! * Don't idle - Turn off your engine * Refill your tank after sunset * Wait to mow the lawn