* WHAT...Dangerously hot conditions with heat index values up to 107 expected.
* WHERE...Portions of north central, northeast, and northwest Ohio.
* WHEN...Until 8 PM EDT Thursday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. A prolonged period of dangerously hot and humid conditions with little overnight relief is expected through the week, which will increase impacts to vulnerable populations.