Wednesday, May 26, 2010

Hurricane Hazards - Inland Flooding

Inland Flooding


Hurricane Preparedness Week
May 23-29, 2010

Inland Flooding Hazard

"In the 1970s, '80s, and '90s, inland flooding was responsible for more than half of the deaths associated with tropical cyclones in the United States."
Ed Rappaport
National Hurricane Center
Stop and think about that for a minute and you'll agree that the force of rushing, rising, water can do extensive damage in a very short period of time.    For those that ignore evacuation suggestions, they could quickly be cut off from safety.  Inland flooding can be a major threat to communities hundreds of miles from the coast as intense rain falls from these huge tropical air masses. 

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Most of these fatalities occur because people underestimate the power of moving water. It isn't necessarily the strongest storm that has the greatest potential for flooding.  Often the weaker, slow moving storm can cause more damage due to flooding than a fast moving severe tropical storm.

What can you do?
  • When you hear hurricane, think inland flooding.
  • Determine whether you live in a potential flood zone.
  • If advised to evacuate, do so immediately.
  • Keep abreast of road conditions through the news media.
  • Move to a safe area before access is cut off by flood water.
  • Do not attempt to cross flowing water. As little as six inches of water may cause you to lose control of your vehicle.
  • Develop a flood emergency action plan.
  • Have flood insurance. Flood damage is not usually covered by homeowners insurance.  Do not make assumptions.  Check your policy. 

The above information is courtesy of NOAA and the National Weather Service.   It is sound advice that should be followed.  Take flash flood and similar warnings to heart and move to safety.


RELATED INFORMATION

• NEVER DRIVE ACROSS A FLOODED ROAD
• 
TURN AROUND DON'T DROWN
• 
TROPICAL CYCLONE FATALITIES 1970-1999
• AVOID FLOOD DAMAGE - CHECKLIST (0.2mbadobe 
acrobat pdf)
• MAX MAYFIELD DISCUSSES - INLAND FLOODING (0.3mb MP3mp3 
file)

• RIVER FORECAST CENTERS
• HYDROMETEOROLOGICAL PREDICTION CENTER
• IN DEPTH REVIEW OF TROPICAL STORM ALLISON
• 6 WAYS TO PROTECT YOUR HOUSE FROM FLOODING
• NATIONAL FLOOD INSURANCE PROGRAM



Rainfall: Rule of thumb

To estimate the total rainfall in inches from a hurricane, divide 100 by the forward speed of the storm in miles per hour (100 / forward speed = estimated inches of rain).  

We'll continue our Hurricane Preparedness Week coverage by looking at the forecast process next.   Consult the NHC and other websites for additional information about hazards.


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