🌡️
Heat Advisory
◍ Riverside County Mountains · 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...High temperatures in the 90s below 5500 feet expected. * WHERE...Riverside County Mountains and San Diego County Mountains below 5500 feet. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Moderate HeatRisk. Warm overnight temperatures will limit relief from the heat.
Key stats
Severity
Moderate
Certainty
Likely
Urgency
Expected
Timeline
- Heat Advisory9/9/2026, 9:58:00 AMHeat Advisory issued September 9 at 2:58AM PDT until September 10 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 San Diego CAupdated 9/9/2026, 9:58:00 AM
OfficialNWS NWS San Diego CAupdated 9/9/2026, 9:58:00 AM
OfficialNWS NWS San Diego CAupdated 9/9/2026, 9:58:00 AM
OfficialNWS NWS San Diego CAupdated 9/9/2026, 9:58:00 AM
OfficialNWS NWS San Diego CAupdated 9/9/2026, 9:58:00 AM
OfficialNWS NWS San Diego CAupdated 9/9/2026, 9:58:00 AM
OfficialNWS NWS San Diego CAupdated 9/9/2026, 9:58:00 AM
OfficialNWS NWS San Diego CAupdated 9/9/2026, 9:58:00 AM
OfficialNWS NWS San Diego CAupdated 9/9/2026, 9:58:00 AM
OfficialNWS NWS San Diego CAupdated 9/9/2026, 9:58:00 AM
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 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.