* WHAT. Dangerously hot conditions with heat index values up to 105 expected. * WHERE. Portions of south central, 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.

* WHAT. Heat index values up to 100 expected. * WHERE. Portions of south central, southwest, west central, and western Maine and central, northern, and southern New Hampshire. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 105. For the Heat Advisory, heat index values up to 100 expected. * WHERE. In Maine, Southern Somerset, Southern Franklin, and Southern Oxford Counties. In New Hampshire, Northern Carroll County. * WHEN. For the Excessive Heat Warning, until 8 PM EDT this evening. For the Heat Advisory, from 11 AM to 7 PM EDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. Tonight's warm overnight low temperatures mainly in the 70s will result in greater cumulative heat stress.

* WHAT. For the Heat Advisory, heat index values up to 100. For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 105 expected. * WHERE. In Maine, Coastal Waldo, Interior Waldo, Knox, Lincoln, Sagadahoc, Coastal Cumberland, and Coastal York Counties. In New Hampshire, Coastal Rockingham County. * WHEN. For the Heat Advisory, until 8 PM EDT this evening. For the Excessive Heat Warning, from 11 AM to 7 PM EDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. Tonight's overnight low temperatures mainly in the 70s will result in greater cumulative heat stress.

* WHAT. For the first Excessive Heat Warning, dangerously hot conditions with heat index values up to 105. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 105 expected. * WHERE. Portions of south central, southwest, and western Maine and central, northern, and southern New Hampshire. * WHEN. For the first Excessive Heat Warning, until 8 PM EDT this evening. For the second Excessive Heat Warning, from 11 AM to 7 PM EDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. Tonight's warm overnight low temperatures mainly in the 70s will result in greater cumulative heat stress.

The Maine Department of Environmental Protection's Bureau of Air Quality has issued an Air Quality Alert for ozone from 11 AM to 11 PM EDT Wednesday. The Maine Department of Environmental Protection recommends that individuals consider limiting strenuous outdoor physical activity to reduce the risk of adverse health effects. People who may be especially sensitive to the effects of elevated levels of pollutants include the very young, the elderly, those with pre-existing respiratory problems such as asthma, those with heart disease and anyone who is working hard outdoors. It is okay to be active outdoors. But if you experience symptoms such as shortness of breath, coughing, throat irritation or an uncomfortable sensation in your chest please consider limiting the intensity and duration of your outdoor activities. A toll free air quality hotline has been established so Maine residents can stay informed on the air quality situations. The toll free number is: 1-800-223-1196. Additionally the Maine Department of Environmental Protection has the air quality forecast available on the web at www.maine.gov/dep/air/aqforecast.