* WHAT. For the Excessive Heat Warning Saturday, dangerously hot conditions with heat index values of 110 to 112. For the Heat Advisory Sunday, heat index values up to 109 expected. * WHERE. North and Eastern Central Texas. * WHEN. For the Excessive Heat Warning, until 7 PM CDT this evening. For the Heat Advisory, from 7 PM this evening to 7 PM CDT Sunday. * IMPACTS. Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

* WHAT. Heat index values up to 109. * WHERE. Western North and Central Texas. * WHEN. Until 7 PM CDT Sunday. * IMPACTS. Hot temperatures and high humidity will increase the risk for heat-related illnesses to occur, particularly for those working or participating in outdoor activities.

* WHAT. Heat index values up to 108. * WHERE. Portions of north central and northeast Texas. * WHEN. Until 7 PM CDT Sunday. * IMPACTS. Hot temperatures and high humidity will increase the risk for heat-related illnesses to occur, particularly for those working or participating in outdoor activities.

* WHAT. Heat index values up to 108. * WHERE. Portions of north central and south central Texas. * WHEN. Until 7 PM CDT Sunday. * IMPACTS. Hot temperatures and high humidity will increase the risk for heat-related illnesses to occur, particularly for those working or participating in outdoor activities.