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Extreme Heat Warning

◍ San Diego County Coastal Areas · 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 in the mid 80s to lower 90s at the beaches to around 100 higher coastal terrain with low temperatures in the lower to mid 70s. For the Heat Advisory, high temperatures in the 80s and lower 90s. * WHERE...Orange County Coastal Areas and San Diego County Coastal Areas. * WHEN...For the Extreme Heat Warning, un

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.