* WHAT. Heat index values up to 109. * WHERE. Portions of central, southeast, southwest, and western Arkansas. * WHEN. For the first Heat Advisory, until 8 PM CDT this evening. For the second Heat Advisory, from 10 AM to 8 PM CDT Thursday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Dangerously hot conditions with heat index values up to 111. * WHERE. Portions of central, eastern, north central, southeast, and western Arkansas. * WHEN. For the first Excessive Heat Warning, until 8 PM CDT this evening. For the second Excessive Heat Warning, from 10 AM to 8 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Heat index values up to 109. * WHERE. Portions of central, north central, southeast, and western Arkansas. * WHEN. For the first Heat Advisory, until 8 PM CDT this evening. For the second Heat Advisory, from 10 AM to 8 PM CDT Thursday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Dangerously hot conditions with heat index values up to 112 expected. * WHERE. Portions of central, eastern, north central, southeast, and western Arkansas. * WHEN. From 10 AM to 8 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Heat index values up to 109 expected. * WHERE. Portions of central, north central, southeast, southwest, and western Arkansas. * WHEN. From 10 AM to 8 PM CDT Thursday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Dangerously hot conditions with heat index values up to 115 expected. * WHERE. Portions of southeast Arkansas, northeast Louisiana, and central, north central, northwest, and west central Mississippi. * WHEN. From 10 AM this morning to 7 PM CDT this evening. * 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 expected. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 112 expected. * WHERE. Portions of southeast Arkansas, northeast Louisiana, and central, north central, northwest, and west central Mississippi. * WHEN. For the first Excessive Heat Warning, from 10 AM this morning to 7 PM CDT this evening. For the second Excessive Heat Warning, from 10 AM to 7 PM CDT Friday. * 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 expected. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 112 expected. * WHERE. Portions of southeast Arkansas, northeast Louisiana, and central, north central, northwest, and west central Mississippi. * WHEN. For the first Excessive Heat Warning, from 10 AM this morning to 7 PM CDT this evening. For the second Excessive Heat Warning, from 10 AM to 7 PM CDT Friday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Heat index values up to 109 expected. * WHERE. Portions of central, north central, southeast, southwest, and western Arkansas. * WHEN. From 10 AM this morning to 8 PM CDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Dangerously hot conditions with heat index values up to 112 expected. * WHERE. Portions of central, eastern, north central, southeast, and western Arkansas. * WHEN. From 10 AM this morning to 8 PM CDT this evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.