8:37 PM
— August 26th, 4:15 PM
* WHAT...Hot daytime conditions with high temperatures between 100
and 110 common. Warm overnight conditions will bring less relief
than usual.
* WHERE...Most mountains and valleys of Los Angeles, Ventura, and
Santa Barbara Counties.
* WHEN...Until 8 PM PDT Friday.
* IMPACTS...There is a high risk for dangerous heat illness,
especially for sensitive groups like the very young, the very old,
those without air conditioning, and those active outdoors.
2:57 PM
— August 26th, 10:00 AM
...RED FLAG WARNING IN EFFECT THROUGH 3 PM FRIDAY FOR MANY
INTERIOR PORTIONS OF SOUTHWEST CALIFORNIA DUE TO EXTREME HEAT AND
INSTABILITY ALONG WITH LOCALLY GUSTY WINDS AND LOW HUMIDITIES...
.A very hot and unstable air mass combined with locally gusty
winds and low humidities will bring a significant risk of large
plume dominated fires with rapid spread and extreme fire
behavior.
* TEMPERATURES...Highs 96 to 106 across the lower elevations.
Highs 85 to 95 common across the higher mountains. Lows in the
mid 70s to mid 80s common in the mountains and foothills.
* INSTABILITY...Very deep mixing heights of 12,000 to 18,000
feet today through Thursday, slightly lower on Friday.
* WINDS...Southwest 10 to 20 mph with gusts 20 to 30 mph each
afternoon into early evening.
* RELATIVE HUMIDITY...Minimum humidities 10 to 20 percent each
day, Poor recoveries overnight hours in the mountains and
foothills with humidities in the 15 to 30 percent range.
* IMPACTS...There is a significant risk of large plume dominated
fires with rapid fire spread and extreme fire behavior. There
is a history of large plume dominated fires this time of year
with similar weather and fuel conditions, including the
Bridge, Bobcat, and Station fires.
7:55 AM
— August 28th, 8:00 PM
* 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...in the the South Coast Air Basin and Coachella Valley.
Levels of ozone pollution can vary by time and location depending on
emissions and air pollution transport.
* WHEN...from 1 PM Monday to 8 PM Friday. 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.
6:39 AM
— August 28th, 8:00 PM
* 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...in the the South Coast Air Basin and Coachella Valley.
Levels of ozone pollution can vary by time and location depending on
emissions and air pollution transport.
* WHEN...from 1 PM Monday to 8 PM Friday. 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.
Angeles National Forest
Fireworks and explosives (including explosive targets) are always prohibited on national forest lands. The prohibition of fireworks and exploding targets on national forest system lands is part of a set of permanent fire safety regulations in the Code of Federal Regulations (CFR), listed below.…
Angeles National Forest
A segment of Rincon-Redbox Road (2N24.3) is closed beginning from State Route 39 on the east to Pine Mountain on the west due to an impassible rock slide, an uneven road surface, and limited opportunities to safely turn around. The purpose of this closure is to provide for public safety.The…
Angeles National Forest
Effective July 24, 2026, fire danger levels have increased to “VERY HIGH” at the Angeles National Forest. The forest has taken this step to enhance public awareness that wildfire probability increases as temperatures rise and vegetation dries out. Despite the change, there are no new campfire…
Angeles National Forest
The San Dimas Experimental Forest, located north of Glendora, is currently closed to public recreation activities. The reason for this closure is that the Experimental Forest's primary purpose is research. Many long-term climate, soil, air pollution, erosion, vegetation, wildlife, and fire studies…
Angeles National Forest
Be aware of the following restricted activities in the San Gabriel Canyon Off-Highway Vehicle Area:Entering or being in the San Gabriel OHV Area when closed. See associated documents and map below.Entering or being in the San Gabriel Reservoir.Parking or leaving a vehicle in violation of posted…
Angeles National Forest
In effort to protect the public and to facilitate natural recovery of the resources affected by the Eaton Fire, this closure extends the Eaton Fire Area Closure through December 31, 2027.The following roads and trails remain closed:RoadsMount Wilson Toll Road (below Mt Wilson Trail) Mount Wilson…
Angeles National Forest
Pursuant to 16 U.S.C. § 551 and 36 C.F.R. § 261.50(a), and to provide for public safety, the following acts are prohibited within the Angeles National Forest and San Gabriel Mountains National Monument. This Order is effective from August 15, 2025, through August 1, 2027.Possessing personal…
Angeles National Forest
The information below provides updates to existing information on our webpage about Angeles National Forest offices and visitor centers. Check this alert regularly. Hours and pass availability may change with limited or no notice.When one office is closed, please contact another forest…
Angeles National Forest
Hikers and equestrians along the Pacific Crest Trail may be affected by a temporary closure of the Williamson Rock area of the Angeles National Forest. This closure (Forest Order No. 05-01-24-04), in effect through December 31, 2026, is for the protection of natural resources, specifically the…
Angeles National Forest
The following is prohibited within the Angeles National Forest and San Gabriel Mountains National Monument from Dec. 16, 2022, through Dec. 15, 2026: 1. Camping outside of a Forest Service developed campground for > 7 consecutive days in a calendar year. 2. Camping outside of a Forest Service…