* WHAT. Heat index values up to 95 expected. * WHERE. In Maine, Kennebec, Southern Somerset, and Southern Franklin Counties. In New Hampshire, Sullivan, Northern Carroll, Southern Grafton, and Cheshire Counties. * WHEN. From noon today to 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS. Warm overnight low temperatures in the 70s will result in greater cumulative heat stress.

* WHAT. For the Heat Advisory, heat index values up to 100 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 105 possible. * WHERE. Portions of southwest and western Maine and central, northern, and southern New Hampshire. * WHEN. For the Heat Advisory, from noon today to 8 PM EDT this evening. For the Excessive Heat Watch, from Wednesday afternoon through Thursday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. Warm overnight low temperatures in the 70s will result in greater cumulative heat stress.