Monday, July 17, 2017

Flash Flooding


A tragic event: at least nine people were killed by a flash flood in Arizona. It was sunny with no sign of rain, but a storm upriver generated it.

Video

Here is advice from the National Weather Service:



On average, more people are killed by flooding than by any other single severe weather hazard, including tornadoes, lightning, and hurricanes. Most of these deaths occur at night, when it is more difficult to recognize flood dangers, and when people are trapped in vehicles.

Remember…

  • DO NOT drive onto a flooded roadway or through flowing water.
  • If you approach a roadway that is flooded, TURN AROUND - DON'T DROWN
  • Drive with extreme caution if roads are even just wet or it is raining. You can lose control of your vehicle if hydroplaning occurs, which is when a layer of water builds up between your tires and the road, causing there to be no direct contact between your vehicle and the road.

If a Flash Flood Warning is issued for your area…
  • If advised to evacuate, do so immediately. Act quickly to save yourself, you may not have much time.
  • Get out of areas that are subject to flooding and move to a safe area before access is cut off by flood waters. Low spots such as dips, canyons, and washes are not the places you want to be during flooding!
  • DO NOT camp or park your vehicle along streams and washes, particularly during threatening conditions.
  • DO NOT drive if not necessary. If driving is necessary, do not attempt to drive over a flooded road, as the depth of the water is not always obvious, and the roadway may no longer be intact under the water. Never drive around a barricade, they are placed there for your protection! If your vehicle stalls, leave it immediately and move to higher ground before water sweeps you and your vehicle away.
  • DO NOT try to walk, swim, or play in flood water. You may not be able to determine if there are holes or submerged debris, or how quickly the water is flowing, and you may be swept away. If water is moving swiftly, as little as 6 inches of water can knock you off of your feet! There is also a danger of hazardous materials polluting the water. Also remember that water is an electrical conductor, if there are power lines down, there is a possibility of electrocution.
  • Always continue to monitor the situation through the National Weather Service website, your NOAA Weather Radio All-Hazards, or favorite local television or radio stations.