* WHAT. For the first Excessive Heat Warning, dangerously hot conditions with heat index values up to 111 degrees. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 111 degrees expected. * WHERE. A portion of West Tennessee. * WHEN. For the first Excessive Heat Warning, until 8 PM CDT this evening. For the second Excessive Heat Warning, from 9 PM this evening to 9 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 111 degrees. For the Heat Advisory, heat index values up to 109 degrees expected. * WHERE. Alcorn, Benton MS, Lafayette, Marshall, Prentiss, Tippah, Tishomingo, and Union Counties. * WHEN. For the Excessive Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from 9 PM this evening to 9 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the first Excessive Heat Warning, dangerously hot conditions with heat index values up to 115 degrees. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 113 degrees expected. * WHERE. Portions of East Arkansas, North Mississippi, Southeast Missouri, and West Tennessee. * WHEN. For the first Excessive Heat Warning, until 8 PM CDT this evening. For the second Excessive Heat Warning, from 9 PM this evening to 9 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the first Excessive Heat Warning, dangerously hot conditions with heat index values up to 111 degrees. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 111 degrees expected. * WHERE. A portion of West Tennessee. * WHEN. For the first Excessive Heat Warning, until 8 PM CDT this evening. For the second Excessive Heat Warning, from 9 PM this evening to 9 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the first Excessive Heat Warning, dangerously hot conditions with heat index values up to 115 degrees. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 114 degrees expected. * WHERE. Portions of East Arkansas, North Mississippi, Southeast Missouri, and West Tennessee. * WHEN. For the first Excessive Heat Warning, until 8 PM CDT this evening. For the second Excessive Heat Warning, from 9 PM this evening to 9 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 110 degrees. For the Heat Advisory, heat index values up to 109 degrees expected. * WHERE. Alcorn, Benton MS, Lafayette, Marshall, Prentiss, Tippah, Tishomingo, and Union Counties. * WHEN. For the Excessive Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from 9 PM this evening to 9 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

AQAMEG The Shelby County Health Department has issued a Code Orange Ozone Forecast effective for Shelby County Tennessee, Crittenden County Arkansas, and DeSoto County Mississippi, including the city of Memphis for Today through sunset. This ozone forecast is due to forecasted ozone values that will be unhealthy for sensitive groups. These values will exceed the Environmental Protection Agency's federal safe health standard. The Shelby County Health Department recommends that sensitive groups which include active children and adults, and people with respiratory disease, such as asthma, limit prolonged outdoor exertion. Please continue to check the latest air quality forecasts and updates until monitored values return to safe levels. For more information go to www.airnow.gov.