* WHAT...Dangerously hot conditions with heat index values up to 105.
* WHERE...Portions of southwest and western Maine and central, northern, and southern New Hampshire.
* WHEN...Until 8 PM EDT this evening.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
* ADDITIONAL DETAILS...Overnight low temperatures tonight will only fall into the upper 60s to low 70s, resulting in accumulated heat stress.