Excessive Heat Warning issued June 20 at 2:17PM MST until June 23 at 8:00PM MST by NWS

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST FRIDAY... * AFFECTED AREA...Grand Canyon Country. * TEMPERATURE...Upper 90s near 6500 feet including the south rim, 112 to 116 degrees near the Colorado River including Phantom Ranch.

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/2sxHdjx