Flash flood warning in place for Lowcountry until Friday night triggered by thunderstorms

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On Friday at 4:13 p.m. a flash flood warning was released by the NWS Charleston SC in effect until 10:15 p.m. The warning is for Berkeley, Charleston and Dorchester counties.

"At 4:13 p.m., Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 4 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly," states the NWS. "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 North Charleston, Mount Pleasant, Goose Creek, Hanahan, Daniel Island, I-26/I-526 Interchange, Downtown Charleston, West Ashley, Don Holt Bridge and Charleston Naval Complex. The heaviest rain has fallen across an area from around North Charleston, to Daniel Island, Cainhoy, and north Mount Pleasant. A few rain gages have measured over 3 inches of rain in this area and another round of heavy rain is moving back into these locations. Impacted roadways include, but are not limited to, Interstate 26, Interstate 526, Highway 41, and Highway 17.

The NWS comments, "Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles."

This warning is in effect until 10:15 p.m.

Protect yourself during a flood with these tips from 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
• Give ample space to large vehicles - Trucks or buses can create a water spray that diminishes visibility.
• Avoid flooded areas - When encountering a flooded road, do a U-turn and head back. The strong currents from flash floods can pull drivers off roadways. Driving through deep water can also negatively affect a vehicle's mechanical and electrical systems.

What is hydroplaning?

Hydroplaning happens when a vehicle starts sliding 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 top three contributors to hydroplaning are:

1. 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.
2. 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.
3. 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

United Robots South Carolina

This story was originally published July 10, 2026 at 4:16 PM.