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Sand to Snow National Monument

Extreme Heat Watch issued July 20 at 12:11PM PDT until July 27 at 8:00PM PDT by NWS San Diego CA

12:11 PM — 10:15 PM

* WHAT...Dangerously hot conditions with high temperatures 103 to 108 possible. Low temperatures in the low to mid-70s, locally near 80 degrees in the Lucerne Valley. * WHERE...Apple and Lucerne Valleys. * WHEN...From Wednesday morning through Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Areas of major HeatRisk. Elevated low temperatures will limit overnight relief from the heat.

Extreme Heat Watch issued July 20 at 12:11PM PDT until July 27 at 8:00PM PDT by NWS San Diego CA

12:11 PM — 10:15 PM

* WHAT...Dangerously hot conditions with high temperatures 113 to 117 possible. Low temperatures in the upper 80s. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...From Wednesday morning through Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Major HeatRisk. Elevated low temperatures will limit overnight relief from the heat.

Extreme Heat Watch issued July 20 at 11:54AM MST until July 27 at 8:00PM MST by NWS Phoenix AZ

11:54 AM — July 21st, 5:00 AM

* WHAT...Dangerously hot conditions possible. Afternoon temperatures 105 to 116. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...In Arizona, Central La Paz, Gila River Valley, Kofa, and Southeast Yuma County. In California, Joshua Tree NP East and Joshua Tree NP West. * WHEN...From Thursday morning through Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

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