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Extreme Heat Warning

◍ Orange County Inland · USA · updated 9/9/2026, 9:58:00 AM

⏱ In effect until 3:30 PM UTC-7

Severity score

65/100

Confidence

High

Why this matters

* WHAT...For the Extreme Heat Warning, dangerously hot conditions with high temperatures of 100 to 106 with low temperatures in the 70s expected. For the Heat Advisory, high temperatures in the 90s expected. * WHERE...Orange County Inland Areas. * WHEN...For the Extreme Heat Warning, until 8 PM PDT this evening. For the Heat Advisory, from 8 PM this evening to 8 PM PDT Thursday. * IMPACTS...Hea

Key stats

Severity

Severe

Certainty

Likely

Urgency

Expected

Timeline

Extreme Heat Warning
9/9/2026, 9:58:00 AM
Extreme Heat Warning issued September 9 at 2:58AM PDT until September 9 at 8:00PM PDT by NWS San Diego CA

Sources & attribution

OfficialNWS NWS San Diego CAupdated 9/9/2026, 9:58:00 AM

OfficialNWS NWS Kansas City/Pleasant Hill MOupdated 9/9/2026, 8:43:00 AM

OfficialNWS NWS Springfield MOupdated 9/9/2026, 8:11:00 AM

OfficialNWS NWS St Louis MOupdated 9/9/2026, 7:40:00 AM

OfficialNWS NWS Fort Worth TXupdated 9/9/2026, 4:31:00 AM

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