Flash flood warning active for Los Angeles County until Friday midday triggered by excessive rainfall
Los Angeles County is under a flash flood warning which was released by the National Weather Service on Friday at 3:38 a.m. The warning is in effect until noon.
“At 3:38 a.m., Doppler radar and automated rain gauges indicated areas of heavy rain re-developing and becoming persistent over the warned area. The expected rainfall rate is 0.25 to 1 inch per hour. Flash flooding is ongoing or expected to begin shortly. Rock slides, mud slides, and debris flows will be possible,” according to the NWS Los Angeles/Oxnard CA. “Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.”
Locations impacted by the warning include Malibu, Woodland Hills, Encino, Agoura Hills, Van Nuys, Beverly Hills, North Hollywood, Universal City, Burbank, Griffith Park, Topanga State Park, Pacific Palisades, Calabasas, Malibu Creek State Park, Brentwood, Interstate 405 through the Sepulveda Pass, Bel Air and Sherman Oaks.
The NWS said, “Turn around, don’t drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of rock slides and mud slides.”
Road closures
Updates on road closures can be found on CalTrans’ website or mobile app or by calling 800-427-7623.
Emergency alerts in Southern California
For “considerable or catastrophic” hazards, emergency alerts will be sent to all enabled mobile phones in the area. To monitor lesser risk, residents are advised to sign up for county alert systems and to monitor agencies’ social media. How to sign up for alerts in your area:
Where to get sandbags
If you’re in an area at risk of flooding, sandbags can be one line of defense. County fire departments typically offer a limited supply of free sandbags for residents of their nearby communities. You should bring your own shovel to fill your bags, and be prepared to show proof of residency.
Sand and sandbags can also be purchased at many home improvement and hardware stores.
Here are links of locations that might have sandbags in your area:
Los Angeles County https://dpw. Lacounty. Gov/dsg/sandbags/
Orange County https://ocfa. Org/AboutUs/Departments/OperationsDirectory/Sandbags. Aspx
San Bernardino County https://sbcfire. Org/sandbags/
Riverside County https://rvcfire. Org/resources/fire-stations
How to fill a sandbag
Not sure how to fill your sandbags? Watch the how-to video, provided by the City of Seal Beach.
Deciphering advisories, watches, and warnings: Understanding weather alerts
- 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 declared when flooding is on the verge of happening or is already underway.
- Flood advisory: Be aware:
A flood advisory is released when flooding is not expected to reach a severity level necessitating a warning. Nonetheless, it can still cause considerable inconvenience and, without exercising caution, potentially lead to situations that threaten life and/or property.
- Flood watch: Be prepared:
A flood watch is issued when conditions are favorable for flooding. It does not mean flooding will occur, but it is possible.
Be flood-ready: Expert guidance from the NWS for your safety
Floods can pose a significant threat, especially if you live in a flood-prone area or find yourself camping in a low-lying region. To ensure your safety, the NWS offers essential flood safety guidelines:
Move to 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.
Adhere to 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:
Avoid basements or rooms submerged in water with electrical outlets or cords. Preventing electrical accidents is crucial.
Swift evacuation for your safety:
If you notice sparks or hear buzzing, crackling, snapping, or popping noises, evacuate immediately. Avoid any water that may be charged with electricity.
Stay away from floodwaters:
Never attempt to walk through floodwaters, even if they appear shallow. Just 6 inches of fast-moving water can forcefully sweep you off your feet.
Seek higher ground when 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.
During periods of intense rainfall, the risk of flooding increases, particularly in low-lying and flood-prone areas. It is imperative to avoid driving through any water on the road, even if it seems shallow. According to the NWS, most cars can be swept away by just 12 inches of rushing water. Prioritize your safety by staying informed and prepared.
Navigating heavy rain: Essential safety measures for wet roads
Rain can turn roads into hazards. Stay informed and follow these tips from the NWS to ensure safety during heavy rainfall:
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.
Reduce speed and drive cautiously:
On wet roads, reducing your speed is crucial. Ease off the accelerator gradually and avoid abrupt braking to prevent skidding.
Choose your lane wisely:
Stay toward the middle lanes – water tends to pool in the outside lanes.
Prioritize visibility:
Enhance your visibility in heavy rain by activating your headlights. Be particularly vigilant for vehicles in blind spots, as rain-smeared windows can obscure them.
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:
Don’t follow large trucks or buses too closely. The spray created by their large tires reduces your vision. Take care when passing them as well; if you must pass, do so with caution.
Mind your windshield wipers:
- Overloaded wiper blades can hinder visibility. If rain severely limits your sight, pull over and wait for conditions to improve. Seek refuge at rest areas or protected spots.
- When stopping by the roadside is your only option, position your vehicle as far off the road as possible, ideally beyond guardrails. Keep your headlights on and activate 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