Weather Alerts For Pasadena, CA

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY # DETAILS -------------------- WHAT Hot daytime conditions with high temperatures between 100 and 110 common. Warm overnight conditions will bring less relief than usual. WHERE Most mountains and valleys of Los Angeles, Ventura, and Santa Barbara Counties. WHEN Until 8 PM PDT Friday. IMPACTS There is a high risk for dangerous heat illness, especially for sensitive groups like the very young, the very old, those without air conditioning, and those active outdoors. ISSUED AT Wednesday, August 26, 2026 at 10:54 AM PDT ISSUED BY National Weather Service Los Angeles/Oxnard CA HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Limit strenuous activities to early morning or evening hours. Take action when you see symptoms of heat exhaustion. # AREAS AFFECTED -------------------- Eastern Santa Monica Mountains Recreational Area, Southern Ventura County Mountains, Antelope Valley, Calabasas and Agoura Hills, Central Ventura County Valleys, Cuyama Valley, Eastern Antelope Valley Foothills, Eastern San Fernando Valley, Eastern San Gabriel Mountains, Interstate 5 Corridor, Lake Casitas, Los Angeles County San Gabriel Valley, Ojai Valley, Santa Barbara County Interior Mountains, Santa Clarita Valley, Santa Susana Mountains, Santa Ynez Mountains Eastern Range, Santa Ynez Mountains Western Range, Southeastern Ventura County Valleys, Western Antelope Valley Foothills, Western San Fernando Valley, Western San Gabriel Mountains and Highway 14 Corridor, Western Santa Monica Mountains Recreational Area Including the cities of Newbury Park, Pomona, Lancaster, Westlake Village, Big Pine Mountain, Van Nuys, Burbank, Pyramid Lake, Glendale, The Angeles Crest Highway, Warm Springs, Mill Creek, Fillmore, Lake Los Angeles, Simi Valley, Gorman, Santa Clarita, Llano, Palmdale, Moorpark, Santa Paula, Thousand Oaks, San Marcos Pass, La Canada Flintridge, Lake Castaic, Piru, Northridge, Tejon Pass, Malibu Bowl, Valyermo, Rose Valley, Oak View, Woodland Hills, East Los Angeles, Montecito Hills, Elizabeth Lake, Pasadena, Universal City, Mount Wilson, Mount Baldy, Topanga, Oat Mountain, El Monte, Acton, New Cuyama, Ojai, Chatsworth, Matilija, Sunland, Wrightwood, Newhall, Valencia, Malibu Lake, Lake Palmdale, Topatopa Mountains, Pearblossom, Figueroa Mountain, San Gabriel, San Rafael Mountain, and Meiners Oaks

# HEADLINE -------------------- AIR QUALITY ALERT FOR HARMFUL LEVELS OF OZONE (SMOG) AIR POLLUTION # SUMMARY -------------------- Eastern San Fernando Valley- Including the cities of Burbank, Glendale, and Universal City Eastern San Gabriel Mountains- Interstate 5 Corridor- Los Angeles County Inland Coast including Downtown Los Angeles- Including the cities of Inglewood, Downey, Norwalk, Beverly Hills, and West Hollywood Los Angeles County San Gabriel Valley- Including the cities of Pasadena, San Gabriel, and Pomona Santa Clarita Valley- Including the cities of Santa Clarita, Newhall, and Valencia Santa Susana Mountains- Western San Fernando Valley- Including the cities of Reseda, Woodland Hills, and Northridge Western San Gabriel Mountains and Highway 14 Corridor- 755 AM PDT Tue Aug 25 2026 # DETAILS -------------------- WHAT The South Coast AQMD has issued an air quality alert due to harmful levels of ozone pollution. Visit https://www.aqmd.gov/alertinfo to check current and forecasted air quality levels. WHERE in the the South Coast Air Basin and Coachella Valley. Levels of ozone pollution can vary by time and location depending on emissions and air pollution transport. WHEN from 1 PM Monday to 8 PM Friday. The highest ozone levels typically occur in the afternoon and early-evening hours. IMPACTS Ozone air pollution can cause serious health problems, including trouble breathing, asthma attacks, and lung damage. Everyone can be affected, but sensitive groups such as people with lung disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk. ISSUED AT Tuesday, August 25, 2026 at 7:55 AM PDT ISSUED BY Relayed by National Weather Service Los Angeles/Oxnard CA HEADER Air Quality Alert Message # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- To protect your health, check air quality levels and act as needed: - When Air Quality Index (AQI) levels are "Unhealthy for Sensitive Groups" (orange), sensitive groups as specified above should limit extended or intense outdoor activity. - When AQI is "Unhealthy" (red), everyone may experience health impacts. Sensitive groups should avoid extended time outdoors. - When AQI is "Very Unhealthy" (purple), sensitive groups should avoid all outdoor physical activity. Everyone else should avoid extended or intense outdoor activity. - When AQI is "Hazardous" (maroon), everyone should avoid all outdoor physical activity. - ADDITIONAL DETAILS... To help keep indoor air clean when air quality is poor: - Keep windows and doors closed - Run your air conditioner and/or an air purifier - Do not use whole house fans or swamp coolers that bring in outside air if you have other methods to stay cool - Avoid other sources of pollution such as fireplaces, candles, incense, and grilling To help minimize outdoor ozone air pollution levels: - Limit the use of gasoline powered lawn and garden equipment until evening hours - Try to delay trips to the gas station and the use of household chemicals until the evening