Los Angeles, California
Regional Weather Alerts
| Alert: | Extreme Heat Watch |
| Area(s): | Parker Valley; Kofa; Yuma; Central La Paz; Gila River Valley; Imperial County Southwest; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley; Chiriaco Summit; Palo Verde Valley; Chuckwalla Valley |
| Effective: | 2026-07-05 @ 2:15 am -> 2026-07-05 @ 5:00 pm |
| Onset: | 2026-07-07 @ 12:00 pm -> 2026-07-09 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Phoenix AZ on 2026-07-05 @ 2:15 am |
| Headline: | Extreme Heat Watch issued July 5 at 12:15AM MST until July 9 at 8:00PM MST by NWS Phoenix AZ |
| Description: |
* WHAT...Dangerously hot conditions possible. Afternoon temperatures 109 to 117. Major Heat Risk. * WHERE...Portions of southwest Arizona and southeast and southern California. * WHEN...From Tuesday morning through Thursday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. |
| Alert: | Lake Wind Advisory |
| Area(s): | West Side Mountains north of 198 |
| Effective: | 2026-07-04 @ 8:19 pm -> 2026-07-05 @ 6:00 am |
| Onset: | 2026-07-04 @ 8:19 pm -> 2026-07-06 @ 1:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Hanford CA on 2026-07-04 @ 8:19 pm |
| Headline: | Lake Wind Advisory issued July 4 at 6:19PM PDT until July 5 at 11:00PM PDT by NWS Hanford CA |
| Description: |
* WHAT...West winds 10 to 15 mph with gusts up to 30 mph. * WHERE...West Side Coastal Mountains north of 198 and San Luis Reservoir. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. |
| Alert: | Air Quality Alert |
| Area(s): | Calabasas and Agoura Hills; Eastern San Fernando Valley; Eastern Santa Monica Mountains Recreational Area; Interstate 5 Corridor; Los Angeles County Beaches; Los Angeles County Inland Coast including Downtown Los Angeles; Los Angeles County San Gabriel Valley; Malibu Coast; Palos Verdes Hills; Santa Clarita Valley; Santa Susana Mountains; Western San Fernando Valley; Western Santa Monica Mountains Recreational Area |
| Effective: | 2026-07-04 @ 12:44 pm -> 2026-07-05 @ 12:45 pm |
| Onset: | 2026-07-04 @ 12:44 pm |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Los Angeles/Oxnard CA on 2026-07-04 @ 12:44 pm |
| Headline: | Air Quality Alert issued July 4 at 10:44AM PDT by NWS Los Angeles/Oxnard CA |
| Description: |
* WHAT...The South Coast AQMD has issued 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...Most of Los Angeles County. Levels of particle pollution can vary by time and location depending on emissions and local weather conditions. * WHEN...High particle pollution due to fireworks expected from dusk Saturday until 3 PM Sunday. * 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. |
| Alert: | Air Quality Alert |
| Area(s): | San Bernardino and Riverside County Valleys-The Inland Empire; Orange County Coastal; Orange County Inland |
| Effective: | 2026-07-04 @ 11:20 am -> 2026-07-05 @ 5:00 pm |
| Onset: | 2026-07-04 @ 11:20 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS San Diego CA on 2026-07-04 @ 11:20 am |
| Headline: | Air Quality Alert issued July 4 at 9:20AM PDT by NWS San Diego CA |
| Description: |
* WHAT...The South Coast AQMD has issued 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...Most of Orange County and the Inland Empire. Levels of particle pollution can vary by time and location depending on emissions and local weather conditions. * WHEN...High particle pollution due to fireworks expected from dusk Saturday until 3 PM Sunday. * 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. |