Extreme Heat Warning

* WHAT...Dangerously hot conditions expected below 4500 feet, with daytime temperatures ranging from 95 to 105 degrees at Havasupai Gardens, 110 to 115 degrees at Phantom Ranch, and 102 to 106 at Page.

* WHERE...Lower elevations of the Grand Canyon, and Marble and Glen Canyons; including Page and Phantom Ranch.

* WHEN...From 9 AM MST /10 AM MDT/ this morning to 8 PM MST /9 PM MDT/ this evening.

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