Los Angeles County was placed under a flood watch by the National Weather Service on Monday at 5:51 a.m. The watch is valid from Tuesday 4 p.m. until Wednesday Dec. 24, at 10 p.m.
The NWS Los Angeles/Oxnard CA said, “Flooding caused by excessive rainfall continues to be possible.”
“Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Mud and debris flows will be possible across foothill and mountain areas, including recent burn scars,” according to the NWS. “You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.”
The full list of affected locations includes:
- Catalina/Santa Barbara Islands
- Santa Clarita Valley
- Los Angeles County Beaches
- Palos Verdes Peninsula
- Los Angeles County Inland Coast including Downtown Los Angeles
- Western Santa Monica Mountains Recreational area
- Eastern Santa Monica Mountains Recreational area
- Calabasas/Agoura Hills
- San Fernando Valley
- Santa Susana Mountains
- 5 Freeway corridor near Santa Clarita
- Western San Gabriel Mountains/Highway 14 Corridor
- Eastern San Gabriel Mountains
- Western Antelope Valley Foothills
- Eastern Antelope Valley Foothills
- Antelope Valley
- San Gabriel Valley
- Cuyama Valley
- San Luis Obispo County Beaches
- San Luis Obispo County Inland Central Coast
- Santa Lucia Mountains
- Southern Salinas Valley
- San Luis Obispo County Interior Valleys
- San Luis Obispo County Mountains
- Santa Barbara County Central Coast Beaches
- Santa Barbara County Inland Central Coast
- Santa Ynez Valley
- Santa Barbara County Southwestern Coast
- Santa Barbara County Southeastern Coast
- Santa Ynez Mountains Western Range
- Santa Ynez Mountains Eastern Range
- Santa Barbara County Interior Mountains
- Ventura County Beaches
- Ventura County Inland Coast
- Lake Casitas
- Ojai Valley
- Central Ventura County Valleys
- Southeastern Ventura County Valleys
- Southern Ventura County Mountains
- Northern Ventura County Mountains
Understanding the differences between advisories, watches, and warnings
- Flash flood warning: Take action!
A flash flood warning is issued when a flash flood is imminent or occurring. If you are in a flood-prone area, move immediately to high ground. A flash flood is a sudden violent flood that can take from minutes to hours to develop. It is even possible to experience a flash flood in areas not immediately receiving rain.
- Flood warning: Take action!
A flood warning is issued when flooding is imminent or occurring.
- Flood advisory: Be aware:
A flood advisory is issued when flooding is not expected to be bad enough to issue a warning. However, it may cause significant inconvenience, and if caution is not exercised, it could lead to situations that may threaten life and/or property.
- Flood watch: Be prepared:
A flood watch is issued when conditions are favorable for flooding. It doesn’t guarantee that flooding will occur, but it signifies that the possibility exists.
Staying safe during a flood: Recommendations from the NWS
In flood-prone regions or while camping in low-lying areas, understanding and following the NWS flood safety guidelines can be a lifesaver:
Seek higher ground:
If you reside in a flood-prone region or are camping in low-lying terrain, the first step to safety is relocating to higher ground.
Follow evacuation orders:
If local authorities issue an evacuation order, heed it promptly. Prior to leaving, secure your home by locking it.
Disconnect utilities and appliances:
If time allows, disconnect your utilities and appliances. This reduces the risk of electrical hazards during flooding.
Avoid basements and submerged areas:
Steer clear of basements or rooms where water has submerged electrical outlets or cords. This helps prevent electrical accidents.
Evacuate promptly for safety:
If you notice sparks or hear buzzing, crackling, snapping, or popping sounds, evacuate without delay. Do not enter water that may carry an electrical charge.
Refrain from walking in floodwaters:
Never attempt to walk through floodwaters. Even just 6 inches of swiftly moving water can forcefully knock you off your feet.
Seek high ground if trapped:
In the event you become trapped by moving water, make your way to the highest point available and contact emergency services by calling 911.
When heavy rain occurs, there is a potential for flooding, particularly in areas that are low-lying or prone to floods. It is crucial to never drive through water on the road, even if it appears shallow. According to the NWS, as little as 12 inches of fast-flowing water can carry away most vehicles. Stay safe by being prepared and informed.
Rainy roadways ahead: Essential safety tips for heavy rain
When heavy rain pours, the risk of flooding and treacherous roads rises. Here’s your guide from the NWS to staying safe during downpours:
Beware of rapid water flow:
During heavy rain, avoid parking or walking near culverts or drainage ditches, where swift-moving water can pose a serious risk.
Maintain safe driving distances:
Use the two-second rule to maintain a safe distance from the car in front of you and allow an extra two seconds in heavy rain.
Slow down and stay cautious:
If it is raining and the roads are wet, slow down. Take your foot off the accelerator and let your speed drop gradually. Never use the brakes suddenly because this may cause the car to skid.
Choose your lane wisely:
Stick to the middle lanes to minimize the risk of hydroplaning. Outer lanes are more prone to accumulating water.
Prioritize visibility:
Turn on your headlights and be careful of other vehicles to the rear and in blind spot areas as they are especially difficult to see through rain-spattered windows.
Watch out for slippery roads:
Be extra careful during the first half hour after rain begins. Grime and oil on the road surface mix with water to make the road slippery.
Keep a safe distance from large vehicles:
Large trucks and buses can reduce your visibility with tire spray. Avoid tailgating and pass with caution.
Mind your windshield wipers:
- Heavy rain can overload the wiper blades. When visibility is so limited that the edges of the road or other vehicles cannot be seen at a safe distance, it is time to pull over and wait for the rain to ease up. It is best to stop at rest areas or other protected areas.
- If the roadside is your only option, pull off as far as possible, preferably past the end of a guard rail, and wait until the storm passes. Keep your headlights on and turn on emergency flashers to alert other drivers of your position.
By following these safety measures, you can significantly reduce risks and ensure your well-being when heavy rain pours down. Stay informed about weather conditions and heed advice from local authorities to make your journey safe and sound.
For more local weather alerts, visit our Weather Advisory page