What is a Flash Flood?

Flash flooding occurs as a result of an intense storm dropping large amounts of rain within a brief period. These floods can happen "in a flash" with little or no warning and the flood waters can reach full peak in only a few minutes. Flash floods are the number one weather-related killer in the United States.

75% of Greater Austin Area flood fatalities are automobile related!

The Danger of Low Water Crossings

Many roads in Austin have low points that flood during storms, called "low-water crossings." Two feet of water will carry away most automobiles and SUVs. As little as six inches of moving water can be dangerous. These areas are extremely hazardous to drive through because of:

• Hidden Dangers- Fast-moving water causes major damage to roads and bridges. A road may look normal, but the pavement or support structures underneath may be missing.
• Hydroplaning- Attempting to drive too quickly across a low water crossing may cause the vehicle to lose contact with the road surface.
• Low Visibility- Heavy rains can reduce visibility to zero. Many flash floods occur at night making it hard to see the danger.
• The Power of Water- The strength of flash flood waters is the most deceiving element for drivers. Moving water has tremendous power to float and push anything in its path. Seemingly shallow water can tumble even large vehicles off the road.

Flash Flood Safety Tips

Stay informed. Head for higher ground and stay away from flood waters when you hear the following warnings on the television or radio:

Flash Flood Watch- Indicates that flash flooding is a possibility within the designated watch area. Be alert.
Urban and Small Stream Advisory- Flooding of small streams, streets, and low-lying areas is occurring.
Flash Flood Warning- Flash flooding has been reported or is imminent. Take necessary precautions at once.

For road closure information, visit the Office of Emergency Management's Emergency Conditions Information web page or call (512) 974-2000.

• Never attempt to drive, swim, or walk through water that is flowing in a roadway, ditch, or stormdrain! Keep children away from these areas. Be aware that water can rise very quickly.

• Don't gamble with your life at low water crossings.

• Don't drive around barricades. The roads are closed for your safety.Like a DWI, it is a Class B Misdemeanor to drive around a barricade at a low water crossing. If caught, you may be arrested, have your car impounded, spend up to 180 days in jail and/or be fined up to $2000.

Call (512) 974-3355 for more information about flooding in Austin.