An updated severe thunderstorm warning was released by the NWS Fort Worth TX on Monday at 3:47 a.m. in effect until 4 a.m. for Collin and Denton counties.

The storms are packing nickel-sized hail (0.88 inches) and wind gusts of up to 60 mph.

“At 3:47 a.m., a severe thunderstorm was located near Cross Roads, or near Denton, moving southeast at 40 mph,” says the NWS. “Expect damage to roofs, siding, and trees.”

Be aware that the thunderstorm may affect the following locations:

• Denton, Shady Shores, Krugerville, and Cross Roads around 3:50 a.m.

• Little Elm and Prosper around 3:55 a.m.

• Frisco, The Colony, and Hackberry around 4 a.m.

• Plano around 4:10 a.m.

Other locations impacted by this severe thunderstorm include Bolivar, Oak Point, Lincoln Park, Lakewood Village, Providence Village, Lewisville Lake, and Lake Ray Roberts.

The NWS states, “For your protection stay inside a sturdy structure and keep away from windows. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Heavy rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.”

This warning is in effect until 4 a.m.

How to react when facing a lightning hazard?

Around 25 million lightning strikes occur in the United States every year, with most taking place during the summer months. The NWS reports that these strikes result in about 20 fatalities annually. The probability of lightning strikes rises as a thunderstorm approaches and peaks when the storm is directly above. As the storm moves away, this likelihood decreases.

Here are recommendations for maintaining safety during a thunderstorm:

• To reduce the chance of being struck by lightning, when venturing outside, have a plan to get to a safer area.

• If the sky grows ominous and you hear thunder, seek out a safe place to take shelter.

• Once indoors, avoid touching corded phones, electrical equipment, plumbing, and windows and doors.

• Wait for 30 minutes after the most recent lightning or thunder before venturing outside.

If finding indoor shelter is not an option:

• Stay away from open fields, hill summits, or ridge tops.

• Keep a distance from tall, isolated trees or other elevated objects. If in a forest, stay close to lower trees.

• If you are in a group, disperse to prevent the current from passing between group members.

• If you are camping in an open space, choose a valley, ravine, or low area for your campsite. Remember, tents do not shield you from lightning.

• Keep a distance from water, wet articles, and metal objects. While water and metal do not draw lightning, they are proficient conductors of electricity.

What to do in the rain on the road?

• Turn on your headlights — Even when it’s light outside, using headlights can improve visibility and alert other drivers to your presence.

• While driving — Stick to the middle lanes and stay on elevated ground. Rainwater tends to accumulate at the road edges.

• Avoid puddles — Driving into puddles or low rainwater areas can lead to vehicles hydroplaning or losing control.

• Maintain a safe distance from large vehicles — Trucks or buses can produce a water spray that hampers 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 is the term for when a vehicle begins 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. Hydroplaning is primarily caused by three factors:

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