Heat Advisory

* WHAT...For the Heat Advisory today, heat index values up to 103 expected. For the Extreme Heat Warning Saturday, dangerously hot conditions with heat index values up to 112 expected.

* WHERE...Canadian, Kingfisher, Logan, Oklahoma, Garfield, Grant, Alfalfa, Major, and Woods Counties.

* WHEN...For the Heat Advisory, until 8 PM CDT this evening. For the Extreme Heat Warning, from 11 AM to 9 PM CDT Saturday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.