Extreme Heat Warning

* WHAT...Dangerously hot conditions, with temperatures of 105 to 110 degrees expected.

* WHERE...Marble and Glen Canyons, including Page and Lake Powell.

* WHEN...From 11 AM MST /noon MDT/ Saturday to 8 PM MST /9 PM MDT/ Sunday.

* IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure.