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WHAT: Dangerously hot conditions with high temperatures in the upper 90s to 110 expected.
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WHERE: San Bernardino and Riverside County Valleys-The Inland Empire.
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WHEN: Until 8 PM PDT Sunday.
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IMPACTS: Heat related illnesses increase significantly during extreme heat events.
* WHAT...Dangerously hot conditions with high temperatures in the upper 90s to 110 expected. * WHERE...San Bernardino and Riverside County Valleys-The Inland Empire. * WHEN...Until 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Ozone is forecast to reach 143 AQI - Unhealthy for Sensitive Groups on Fri 07/31/2026. Ozone is forecast to reach 112 AQI - Unhealthy for Sensitive Groups on Sat 08/01/2026.
Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors
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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.
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WHERE: San Bernardino, Redlands, Riverside, Crestline and the Coachella Valley.. Levels of ozone pollution can vary by time and location depending on emissions and air pollution transport.
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WHEN: until 8 PM Sunday. The highest ozone levels typically occur in the afternoon and early-evening hours.
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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.
* 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...San Bernardino, Redlands, Riverside, Crestline and the Coachella Valley.. Levels of ozone pollution can vary by time and location depending on emissions and air pollution transport. * WHEN...until 8 PM Sunday. 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.
To protect your health, check air quality levels and act as needed:
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When Air Quality Index (AQI) levels are "Unhealthy for Sensitive Groups" (orange), sensitive groups as specified above should limit extended or intense outdoor activity.
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When AQI is "Unhealthy" (red), everyone may experience health impacts. Sensitive groups should avoid extended time outdoors.
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When AQI is "Very Unhealthy" (purple), sensitive groups should avoid all outdoor physical activity. Everyone else should avoid extended or intense outdoor activity.
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When AQI is "Hazardous" (maroon), everyone should avoid all outdoor physical activity.
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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
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
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