Extreme Heat Warning

* WHAT...For the Heat Advisory, heat index values as high as 100. For the Extreme Heat Warning, dangerously hot conditions with heat index values as high as 105 expected.

* WHERE...Niagara, Orleans, Monroe, Wayne, Northern Cayuga, Oswego, Livingston, and Ontario Counties.

* WHEN...For the Heat Advisory, until 8 PM EDT this evening. For the Extreme Heat Warning, from noon Wednesday to 8 PM EDT Friday.

* IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. Hot temperatures and high humidity may cause heat related illnesses to occur.