Severe Heatwave ● Closed

Extreme Heat Watch issued September 30 at 9:46AM PDT until October 8 at 8:00PM PDT by NWS Los Angeles/Oxnard CA, United States of America

Event time: Sep 30, 2026 16:46 UTC Last updated: Oct 9, 2026 United States

Icon = what happened · ring colour = how serious: Extreme Severe Moderate Minor

Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.

* WHAT...Dangerously hot conditions with temperatures up to 90 at the
coast and 105 in the valleys.

* WHERE...Coast and valleys of Los Angeles and Ventura Counties.

* WHEN...From Friday morning through Thursday, October 08.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.

* ADDITIONAL DETAILS...Very hot temperatures are likely to continue
into the second week of October, possibly requiring an extension of
this product.

Measurements

Coordinates	39.9645, -100.8105
Region	Catalina and Santa Barbara Islands; Santa Clarita Valley; Ventura County Beaches; Ventura County Inland Coast; Lake Casitas; Ojai Valley; Central Ventura C
Location Precision	country
Issuing Authority	United States of America — us-noaa-nws-en
Cap Urgency	Future
Cap Certainty	Likely
Cap Expires	2026-10-02T10:15:00-07:00

Official source

Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.

This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.

Severity as published by WMO Alert Hub (national weather services).

View original report

Also reported by: WMO

This event as JSON · API and licence

Source updated 19 days ago (Sep 30, 2026 16:47 UTC) · we last heard from WMO Alert Hub (national weather services) 50 seconds ago

On a slow connection? Low-bandwidth version — no map, no scripts, under 14 KB.

About this location

The agency did not publish coordinates for this warning. The pin is the centre of the country, not the location of the event — read the area name, not the map, for where it applies.

Area as the agency stated it: Catalina and Santa Barbara Islands; Santa Clarita Valley; Ventura County Beaches; Ventura County Inland Coast; Lake Casitas; Ojai Valley; Central Ventura C

Official authorities in United States

If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.

More for United States →

What to do

Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.

Recognising heat exhaustion and heat stroke, keeping cool, and protecting vulnerable people during extreme heat.

Open Heatwave Safety Guide →

Nearby & related events

Wind Advisory issued October 19 at 1:35PM AKDT until October 20 at 10:00PM AKDT by NWS Juneau AK, United States of America Moderate Severe Storm United States active via WMO 27 min ago Wind Advisory issued October 19 at 1:35PM AKDT until October 21 at 4:00PM AKDT by NWS Juneau AK, United States of America Moderate Severe Storm United States active via WMO 27 min ago Wind Advisory issued October 19 at 1:35PM AKDT until October 21 at 4:00AM AKDT by NWS Juneau AK, United States of America Moderate Severe Storm United States active via WMO 27 min ago Winter Weather Advisory issued October 19 at 1:34PM AKDT until October 21 at 4:00AM AKDT by NWS Anchorage AK, United States of America Moderate Cold Wave United States active via WMO 28 min ago Winter Weather Advisory issued October 19 at 1:34PM AKDT until October 20 at 10:00PM AKDT by NWS Anchorage AK, United States of America Moderate Cold Wave United States active via WMO 28 min ago

Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.