Flooding in Boulder, Colo., overnight led to a dramatic rescue this morning after a driver was overtaken by rushing water on a road and his car overturned. Three people have died in the flooding.

Police received word shortly before 6 a.m. that three cars were submerged in water on a road that had been eroded by a deluge, which totaled six inches in the area, according to officials.

Rescue workers found drivers in each of the three cars that were trapped by the rushing water. They used ropes to stabilize the vehicles and then evacuated the drivers, who had minor injuries, according to officials.

The video of one rescue captured by KCNC shows a driver trapped in his overturned car by the flood, struggling for air as the vehicle filled with water. Rescue workers from local fire companies had to pull open the car's door and evacuate the man, who was safely brought to shore.

He is now receiving medical treatment.

Water levels continue to rise in Colorado rivers, according to ABC News affiliate KMGH. Three deaths are being blamed on the flooding.

One person was killed in the mountain community of Jamestown when the heavy rains caused a building to collapse late Wednesday night, according to Office of Emergency Management officials. A second man's body was recovered in water near Colorado Springs early this morning, officials said.

The death toll rose to three after a man's body was found in north Boulder County.

The National Weather Service has issued a flash flood emergency for Boulder County and northwest Jefferson County. Residents of Jamestown, where the first death occurred, are under a mandatory evacuation order after reports that multiple homes had collapsed.

One of the main thoroughfares in the area, U.S. 36, was closed by authorities after mud and rockslides made the road impassable.

The area being hit by the floods was ravaged by a wildfire a few years ago. The lack of trees or vegetation in the area, thanks to the fire, is causing the water and debris to move downhill so quickly, authorities said.

"With the water and the power lines, it's not a good mixture," said Lee Mathis of the Erie Police Department.

Also hard hit was the University of Colorado campus at Boulder where college students suddenly found themselves surrounded by raging waters. University officials cancelled classes today and local school districts have followed suit, until the storms pass and the roads are clear.

Officials are warning motorists to stay off the roads and to avoid creeks and waterways. With reporting by ABC News Katie Kindelan