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Alert Archives for All California Counties
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9 total alerts issued on this day

Updates Every 15 Minutes
Spacer GifLast Update:August 16, 2026 - 7:00 am PDT
Imperial County
SVW.gif   EXTREME HEAT WARNING   (2 updates)
  Areas affected: Parker Valley; Kofa; Yuma; Central La Paz; Southeast Yuma County; Gila River Valley; Imperial County Southwest; Imperial County Southeast; Imperial County West; Imperial Valley; Palo Verde Valley; Chuckwalla Valley
Effective: Aug 15 10:48 pm Expired: Aug 16 2:00 pm Duration: 15 hrs   12 mins  
  Areas affected: Parker Valley; Kofa; Yuma; Central La Paz; Southeast Yuma County; Gila River Valley; Imperial County Southwest; Imperial County Southeast; Imperial County West; Imperial Valley; Palo Verde Valley; Chuckwalla Valley
Effective: Aug 16 11:19 am Expired: Aug 17 3:00 am Duration: 15 hrs   41 mins  
Riverside County
SVW.gif   EXTREME HEAT WARNING   (2 updates)
  Areas affected: Parker Valley; Kofa; Yuma; Central La Paz; Southeast Yuma County; Gila River Valley; Imperial County Southwest; Imperial County Southeast; Imperial County West; Imperial Valley; Palo Verde Valley; Chuckwalla Valley
Effective: Aug 15 10:48 pm Expired: Aug 16 2:00 pm Duration: 15 hrs   12 mins  
  Areas affected: Parker Valley; Kofa; Yuma; Central La Paz; Southeast Yuma County; Gila River Valley; Imperial County Southwest; Imperial County Southeast; Imperial County West; Imperial Valley; Palo Verde Valley; Chuckwalla Valley
Effective: Aug 16 11:19 am Expired: Aug 17 3:00 am Duration: 15 hrs   41 mins  
San Bernardino County
SWA.gif   EXTREME HEAT WATCH  
  Areas affected: Lake Havasu and Fort Mohave; Lake Mead - AZ side; Lake Mohave - AZ side; Hualapai Mountains; Northwest Deserts; Death Valley National Park; Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin; Cadiz Basin; San Bernardino County-Upper Colorado River Valley; Northeast Clark County; Western Clark and Southern Nye County; Las Vegas Valley; Southern Clark County; Lake Mead - NV side; Lake Mohave - NV side
Effective: Aug 16 10:45 am Expired: Aug 17 5:00 am Duration: 18 hrs   15 mins  
Inyo County
SWA.gif   EXTREME HEAT WATCH  
  Areas affected: Lake Havasu and Fort Mohave; Lake Mead - AZ side; Lake Mohave - AZ side; Hualapai Mountains; Northwest Deserts; Death Valley National Park; Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin; Cadiz Basin; San Bernardino County-Upper Colorado River Valley; Northeast Clark County; Western Clark and Southern Nye County; Las Vegas Valley; Southern Clark County; Lake Mead - NV side; Lake Mohave - NV side
Effective: Aug 16 10:45 am Expired: Aug 17 5:00 am Duration: 18 hrs   15 mins  
San Luis Obispo County
HTY.gif   HEAT ADVISORY  
  Areas affected: Cuyama Valley; Santa Clarita Valley; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Ynez Mountains Western Range; Santa Barbara County Interior Mountains; Calabasas and Agoura Hills; Western San Fernando Valley; Eastern San Fernando Valley; Santa Susana Mountains; Southern Ventura County Mountains; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Los Angeles County San Gabriel Valley
Effective: Aug 16 12:21 pm Expired: Aug 17 12:30 am Duration: 12 hrs   09 mins  
Santa Barbara County
HTY.gif   HEAT ADVISORY  
  Areas affected: Cuyama Valley; Santa Clarita Valley; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Ynez Mountains Western Range; Santa Barbara County Interior Mountains; Calabasas and Agoura Hills; Western San Fernando Valley; Eastern San Fernando Valley; Santa Susana Mountains; Southern Ventura County Mountains; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Los Angeles County San Gabriel Valley
Effective: Aug 16 12:21 pm Expired: Aug 17 12:30 am Duration: 12 hrs   09 mins  
Ventura County
HTY.gif   HEAT ADVISORY  
  Areas affected: Cuyama Valley; Santa Clarita Valley; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Ynez Mountains Western Range; Santa Barbara County Interior Mountains; Calabasas and Agoura Hills; Western San Fernando Valley; Eastern San Fernando Valley; Santa Susana Mountains; Southern Ventura County Mountains; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Los Angeles County San Gabriel Valley
Effective: Aug 16 12:21 pm Expired: Aug 17 12:30 am Duration: 12 hrs   09 mins  


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