Aliso Viejo Warnings, Watches and Advisories

Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Aliso Viejo.

Use the Radar Maps link provided to understand the trajectory of a storm.

Air Quality Alert issued July 9 at 8:20AM PDT by NWS Los Angeles/Oxnard CA

* WHAT...The South Coast AQMD has updated an air quality alert due to harmful levels of ozone pollution. * WHERE...In Metropolitan Los Angeles, the San Fernando Valley, Santa Clarita, and the San Gabriel Mountains. Levels of ozone pollution can vary by time and location depending on emissions and air pollution transport. * WHEN...Until Thursday at 800 PM PDT. 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. * 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

Heat Advisory issued July 9 at 2:02AM PDT until July 10 at 8:00PM PDT by NWS San Diego CA

* WHAT...High temperatures of 95 to 105 expected. * WHERE...San Bernardino and Riverside County Valleys-The Inland Empire. * WHEN...From 10 AM this morning to 8 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses.

Extreme Heat Warning issued July 9 at 2:02AM PDT until July 10 at 8:00PM PDT by NWS San Diego CA

* WHAT...Dangerously hot conditions with temperatures of 114 to 118 degrees expected. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...From 10 AM this morning to 8 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Heat Advisory issued July 9 at 2:02AM PDT until July 10 at 8:00PM PDT by NWS San Diego CA

* WHAT...High temperatures in the 90s below 5000 feet expected. * WHERE...Riverside County Mountains and San Diego County Mountains. * WHEN...From 10 AM this morning to 8 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses.

Heat Advisory issued July 9 at 2:02AM PDT until July 10 at 8:00PM PDT by NWS San Diego CA

* WHAT...High temperatures of 93 to 103 for the inland valleys near the foothills expected. * WHERE...San Diego County Valleys. * WHEN...From 10 AM this morning to 8 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses.

Wind Advisory issued July 9 at 1:40AM PDT until July 10 at 3:00AM PDT by NWS Los Angeles/Oxnard CA

* WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Santa Barbara County Southwestern Coast and Santa Ynez Mountains Western Range. * WHEN...From 3 PM this afternoon to 3 AM PDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Extreme Heat Warning issued July 9 at 12:49AM MST until July 10 at 8:00PM MST by NWS Phoenix AZ

* WHAT...Dangerously hot conditions. Afternoon temperatures 108 to 120 expected. Major Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * WHERE...Portions of southeast and southern California. * WHEN...From 10 AM this morning to 8 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Extreme Heat Warning issued July 8 at 1:08AM PDT until July 9 at 8:00PM PDT by NWS Las Vegas NV

* WHAT...Dangerously hot conditions are expected on Wednesday. Afternoon high temperatures in the Colorado River Valley will be between 110 and 120 degrees. High temperatures in the lower elevations of southern Mohave County will be around 110 to 115 degrees. * WHERE...Lake Mead National Recreation Area, Lake Havasu and Fort Mohave, Arizona's Northwest Deserts, and San Bernardino County-Upper Colorado River Valley. * WHEN...From 10 AM PDT /10 AM MST/ to 8 PM PDT /8 PM MST/ Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Air Quality Alert issued July 7 at 3:58PM PDT by NWS San Diego CA

* WHAT...The South Coast AQMD has issued an air quality alert due to harmful levels of ozone pollution. * WHERE...In inland Orange County, the Santa Ana Mountains, the Inland Empire, the San Bernardino Mountains, the Riverside County mountains and the Coachella Valley. Levels of ozone pollution can vary by time and location depending on emissions and air pollution transport. * WHEN...Monday 2:30 PM until Thursday 8:00 PM. 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.

Air Quality Alert issued July 7 at 2:31PM PDT by NWS Los Angeles/Oxnard CA

* WHAT...The South Coast AQMD has issued an air quality alert due to harmful levels of ozone pollution. * WHERE...in the . Levels of ozone pollution can vary by time and location depending on emissions and air pollution transport. * WHEN...Monday 2:30 PM until Thursday 8:00 PM. 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.

The Extreme Heat Watch has been replaced. Please see the latest information from NWS San Diego CA on this developing situation.

The Extreme Heat Watch has been replaced. Please see the latest information from NWS San Diego CA on this developing situation.