Red flag warning for Central Valley until Monday evening – enhanced fire threat

Published May 18, 2025

The National Weather Service released a red flag warning at 11:49 a.m. on Sunday in effect until Monday at 8 p.m. The warning is for Northern Sacramento Valley to Southern Tehama County Line Below 1000 Ft, Central Sacramento Valley including Glenn/Colusa/Yuba/Northern Sutter/Butte County Below 1000 Ft, Southern Sacramento Valley In Yolo/Sacramento/Far Western Placer/Southern Sutter and Solano County Below 1000 Ft – Excludes the Delta, Eastern Delta and Northern San Joaquin Valley in San Joaquin and Stanislaus counties Below 1000 ft – Excludes the Delta.

Residents can expect winds to be north winds 15 to 25 mph with gusts up to 35 mph expected. Strongest winds are expected across the central Sacramento Valley, along and west of Interstate 5 and humidity 15 to 25 percent.

“The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended,” says the NWS.

What is the significance of a red flag warning?

A red flag warning indicates that either extreme fire weather conditions are currently happening or will happen soon, as per the NWS. Warm temperatures, very low humidities, and stronger winds are expected to combine to produce an increased risk of fire to spread rapidly.

What actions are necessary during a red flag warning?

A red flag warning demands vigilance and immediate readiness to respond to potential fires. The NWS provides these vital guidelines to minimize fire hazards and ensure your safety:

1. Secure burn barrels:

In areas where controlled burning is sanctioned, make certain that burn barrels sport a weighty metal cover, equipped with holes no larger than 3/4 of an inch.

2. Responsible disposal of smoking materials:

Never discard lit cigarette butts outside, and avoid tossing cigarettes or matches from a moving vehicle. These seemingly small actions can lead to dry grass ignition, potentially sparking a wildfire.

3. Properly extinguish outdoor fires:

To safeguard against accidental fires, diligently extinguish all outdoor fires. Drown them with an ample amount of water and stir to confirm that everything is cold to the touch. Submerge charcoal in water until it’s thoroughly cooled. Never dispose of live charcoal on the ground.

4. Never desert a blaze:

Refrain from leaving any fire unattended. Even minor parks or embers might be carried into leaves or grass, kindling a fire that can swiftly expand.

Understanding the gravity of a red flag warning and adhering to these precautions is pivotal in mitigating the risk of wildfires during these perilous conditions. Prioritize safety, stay well-informed, and act responsibly to safeguard lives and property.

Source: The National Weather Service

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