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Extreme Heat Warning

◍ Lake Havasu and Fort Mohave · USA · updated 9/8/2026, 7:09:00 AM

⏱ In effect until 4:00 PM UTC-7

Severity score

65/100

Confidence

High

Why this matters

* WHAT...Dangerously hot late-season conditions expected with high temperatures up to 112 to 116 in Death Valley and the Colorado River Valley; up to 105 to 110 in the Las Vegas Valley, Moapa Valley, and Pahrump Valley. * WHERE...Portions of northwest Arizona, southeast California, and southern Nevada. * WHEN...From 10 AM PDT / MST to 8 PM PDT / MST Thursday. * IMPACTS...Heat-related illnesses

Key stats

Severity

Severe

Certainty

Likely

Urgency

Expected

Severity over time

Timeline

Extreme Heat Warning
9/8/2026, 7:09:00 AM
Extreme Heat Warning issued September 8 at 12:09AM PDT until September 10 at 8:00PM PDT by NWS Las Vegas NV

Sources & attribution

OfficialNWS NWS Las Vegas NVupdated 9/8/2026, 7:09:00 AM

⚠This is an informational severity score, not an official warning. Follow guidance from NWS/NOAA, FEMA (ready.gov), and local emergency management.