NWS / NOAA weather: Extreme Heat Warning issued July 7 at 1:23AM MST until July 11 at 8:00PM MST by NWS Flagstaff AZ

* WHAT...Dangerously hot conditions below 4000 feet, with daytime
temperatures ranging from 101 to 104 degrees at Havasupai Gardens
and 111 to 114 degrees at Phantom Ranch.

* WHERE...Lower elevations of the Grand Canyon.

* WHEN...Until 8 PM MST Saturday.

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

Source: NWS / NOAA weather.