Hydroplaning is when the:

As vehicle speed increases and the amount of water on the roadway increases, vehicles tend to ride on a cushion of water and the tires lose contact with the road. This is called “hydroplaning.” Hydroplaning can cause partial or complete loss of control of the vehicle.

• Windshield wipers cannot keep the windshield clear of rain.
• Tires lose contact with the road surface.
• Spray from a large truck reduces visibility.