Weather Alerts For Pomona, CA

# HEADLINE -------------------- HEAT ADVISORY REMAINS IN EFFECT FROM 8 AM TUESDAY TO 9 PM PDT THURSDAY # DETAILS -------------------- WHAT Dangerously hot conditions with temperatures in the middle to upper 90s possible. Hottest Wednesday. WHERE Eastern San Fernando Valley, Eastern San Gabriel Mountains, Los Angeles County San Gabriel Valley, Santa Clarita Valley, Western San Fernando Valley, and Western San Gabriel Mountains and Highway 14 Corridor. WHEN From 8 AM Tuesday to 9 PM PDT Thursday. IMPACTS There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors. ADDITIONAL DETAILS Higher humidity will have the potential to add to the heat discomfort in the afternoons. Temperatures are expected to cool slightly after Thursday. ISSUED AT Monday, June 22, 2026 at 8:16 PM 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. # AREAS AFFECTED -------------------- Eastern San Fernando Valley, Eastern San Gabriel Mountains, Los Angeles County San Gabriel Valley, Santa Clarita Valley, Western San Fernando Valley, Western San Gabriel Mountains and Highway 14 Corridor Including the cities of Mill Creek, Chatsworth, Valencia, Sunland, Mount Baldy, Pomona, Mount Wilson, El Monte, Wrightwood, Acton, Woodland Hills, Warm Springs, The Angeles Crest Highway, La Canada Flintridge, Northridge, Santa Clarita, Van Nuys, San Gabriel, Burbank, Lake Castaic, Universal City, Glendale, Pasadena, Newhall, and East Los Angeles

# HEADLINE -------------------- AIR QUALITY ALERT DUE TO HARMFUL FINE PARTICLE POLLUTION LEVELS # SUMMARY -------------------- 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 1228 PM PDT Mon Jun 22 2026 # DETAILS -------------------- WHAT The South Coast AQMD has extended an air quality alert due to harmful levels of fine particle pollution. Visit https://www.aqmd.gov/alertinfo to check current and forecasted air quality levels. WHERE in the San Gabriel Valley, Downtown Los Angeles, and East Los Angeles. Levels of particle pollution can vary by time and location depending on emissions and local weather conditions. WHEN until at least noon on Tuesday. IMPACTS Particle pollution can get deep into the lungs and cause serious health problems such as heart attacks, bronchitis, asthma attacks, and difficulty breathing. Everyone can be affected, but sensitive groups such as people with lung or heart disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk. ISSUED AT Monday, June 22, 2026 at 12:28 PM 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, grilling, and gasoline-powered lawn and garden equipment