Heat Advisory issued June 20 at 1:53PM PDT until June 21 at 9:00PM PDT by NWS

...Excessively Hot Conditions to Continue Across the Lower Deserts Through Sunday and for the High Deserts Through Friday... .Strong high pressure aloft over the southwest states will create dangerously hot conditions across the deserts. Although the ridge will weaken some, excessive heat will continue all the way through the upcoming weekend for the lower deserts.

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