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At 4:52 a.m. on Sunday, the NWS San Diego CA released an updated coastal flood advisory valid from Monday 5 a.m. until Wednesday 5 p.m. for San Diego County Coastal Areas and Orange County Coastal.
“Minor coastal flooding expected due to the combination of high tides and elevated surf,” states the NWS. “Elevated surf of 3-5 feet expected. Local sets to 7 feet possible on south-facing beaches. Morning high tides are expected to peak between 6.7 and 7.0 feet through Wednesday, peaking Tuesday morning. The listed tide predictions have been corrected to reflect current trends in actual tide observations.”
“Minor coastal flooding and minor coastal erosion expected during high tides. Additionally, elevated surf will lead to strong rip currents,” says the NWS. “If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Remain out of the water to avoid hazardous swimming conditions.”
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This advisory is in effect until Wednesday at 5 p.m.
Ways to stay safe during a flood according to the NWS
For either residents or campers of flood-prone, low-lying areas, take immediate action and seek higher ground. Follow evacuation instructions without delay. If time permits, lock your home upon departure and disconnect utilities and appliances. Avoid entering basements or rooms where electrical outlets or cords are submerged in water. If you see sparks or hear buzzing, crackling, snapping, or popping sounds, evacuate the area immediately. Refrain from entering water that may have electricity in it and avoid walking through floodwaters. Even 6 inches of moving water can pose a serious risk of knocking you off your feet. If you find yourself trapped by moving water, move to the highest possible point and contact emergency services, and dial 911.
During heavy rainfall, there is a risk of flooding, especially in low-lying and flood-prone areas. Remember to never drive through water on the road, even if it seems shallow. According to the NWS, as little as 12 inches of rapidly flowing water can carry away most cars.
What steps to follow when driving in the rain?
- Turn on headlights – Even in daylight, using headlights can help improve visibility and let other drivers know where you are.
- On the road – Drive in the middle lanes and stay on high ground. Rainwater tends to stockpile on the edges of roads.
- Keep clear of puddles – Driving through puddles or low rainwater areas can cause vehicles to hydroplane or skid out of control
- Do not follow large vehicles closely – Large vehicles like trucks or buses can create a spray of water that can reduce your visibility.
- Steer clear of flooded areas – When coming to a flooded road, turn around and head back. Flash flooding currents are strong and can sweep drivers off roadways. Driving through deep water can also affect a vehicle’s mechanical and electrical systems.
What is hydroplaning?
Hydroplaning occurs when a vehicle begins to slide uncontrollably on wet roads.
This happens when water in front of the tire builds up faster than the vehicle’s weight can push water out of the way. The water pressure then causes the vehicle to rise and slide on a thin layer of water between the tires and the road, making the driver lose control. The three main causes of hydroplaning are:
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- Vehicle speed – When a vehicle’s speed increases, the tire-traction grip and ability to control the vehicle decreases. Drive at a reduced speed during wet weather.
- Water depth – The deeper the water, the sooner a vehicle loses traction on the road. It doesn’t matter how deep the water is, even a thin layer can lead to hydroplaning.
- Tire tread depth – Checking your tire tread before hitting the road is important, as low or no tread can lead to sliding.
In the event of your vehicle hydroplaning, here’s what to know:
- Ease off the accelerator – Step off the gas to slow down the vehicle until the tires find traction.
- Turn into the skid – Turning into the skid can help the vehicle’s tires realign to regain control.
- Make sure the tires reconnect with the road – During the skid, wait until the tires reconnect with the road and then gently straighten the wheels to regain control.
- Brake gently as needed – Brake normally if the vehicle has anti-lock brakes and pump brakes gently if in an older vehicle.
Source: The National Weather Service
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This story was originally published September 26, 2026 at 2:11 PM.