AccuWeather

* WHAT...For the Heat Advisory, temperatures of 93 to 103 degrees expected. For the Excessive Heat Watch, dangerously hot conditions with temperatures of 98 to 108 possible. Warm overnight conditions are expected much of this week, limiting nighttime relief from the heat. * WHERE...Calabasas and Agoura Hills, Central Ventura County Valleys, Ojai Valley, Santa Clarita Valley, Santa Susana Mountains, and Western San Fernando Valley. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Excessive Heat Warning, from 10 AM Tuesday to 9 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.More

* WHAT...For the Heat Advisory, temperatures of 93 to 103 degrees expected. For the Excessive Heat Watch, dangerously hot conditions with temperatures of 98 to 108 possible. Warm overnight conditions are expected much of this week, limiting nighttime relief from the heat. * WHERE...Calabasas and Agoura Hills, Central Ventura County Valleys, Ojai Valley, Santa Clarita Valley, Santa Susana Mountains, and Western San Fernando Valley. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Excessive Heat Warning, from 10 AM Tuesday to 9 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.More

* WHAT...Dangerously hot conditions with high temperatures between 95 and 105, and very warm nights. * WHERE...Eastern San Gabriel Mountains, Santa Ynez Mountains Eastern Range, and Santa Ynez Mountains Western Range. * WHEN...Until 9 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.More

* WHAT...Dangerously hot conditions with high temperatures of 98 to 106 degrees possible. Warm overnight conditions are expected, limiting nighttime relief from the heat. * WHERE...Eastern San Fernando Valley, Eastern Santa Monica Mountains Recreational Area, Lake Casitas, Los Angeles County San Gabriel Valley, Southeastern Ventura County Valleys, and Western Santa Monica Mountains Recreational Area. * WHEN...From 10 AM Tuesday to 9 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.More

* WHAT...Dangerously hot conditions with high temperatures of 106 to 116, and very warm nights. * WHERE...A portion of southwest California. * WHEN...Until 9 PM PDT Saturday. * IMPACTS...There is a high risk for dangerous heat illness for anyone, especially for the very young, the very old, those without air conditioning, and those active outdoors.More

...AIR QUALITY ALERT DUE TO ELEVATED OZONE AIR POLLUTION... The South Coast AQMD has extended an air quality alert due to high levels of ozone (smog). The air quality alert is in effect until 7 PM Wednesday. Elevated levels of ozone the predominant summertime pollutant are likely to result in poor air quality in the afternoon and early- evening hours. Ozone air pollution can cause respiratory health problems, including trouble breathing, asthma attacks, and lung damage. Children, older adults, and people with asthma or COPD may be more sensitive to the health effects of ozone. Air quality can change depending on time of day and weather conditions. Increased emissions of chemicals and faster ozone formation rates due to heat, along with low winds and stagnant weather can cause unusually high and persistent levels of ozone pollution. To help minimize ozone air pollution levels: - Limit the use of gasoline powered lawn and garden equipment until evening hours - Conserve electricity and set your air conditioner at a higher temperature - Try to delay trips to the gas station and the use of household chemicals until the evening Check air quality levels and take appropriate action as needed. When air quality index (AQI) levels are Unhealthy for Sensitive Groups (orange), people with heart or lung disease, pregnant women, children, and older adults should limit prolonged or heavy outdoor exertion. When air quality reaches Unhealthy (red) AQI levels, everyone may experience adverse health effects and sensitive groups should avoid prolonged time outdoors. At Very Unhealthy (purple) AQI levels, sensitive groups should avoid all outdoor physical activity and everyone else should avoid prolonged or heavy outdoor exertion. To view current and forecasted air quality levels, visit the South Coast Air Quality Management District website at aqmd.gov or download the mobile app at www.aqmd.gov/mobileapp. Additional details for this air quality alert may be available at www.aqmd.gov/advisory. To view current and forecasted air quality levels, visit the Mojave Desert Air Quality Management District website at mdaqmd.ca.gov. Additional details for this air quality alert may be available at www.mdaqmd.ca.gov/advisories. To view current and forecasted air quality levels, visit the Antelope Valley Air Quality Management District website at www.avaqmd.ca.gov. To view current and forecasted air quality levels, visit the San Diego County Air Pollution Control District website at www.sdapcd.org/content/sdapcd/air-quality.html. Additional details for this air quality alert may be available at www.sdapcd.org/content/sdapcd/air-quality/smoke-advisory.htmlMore