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Floods
CERT Basic Training
Hazards
When Floods Occur
● Any time a body of water rises to cover
what is usually dry land
● One of most common hazards
 75% of Federally declared disasters
● May be local
or widespread
● May develop
slowly or fast
Fl-1
CERT Basic Training
Unit 1: Floods
Causes of Floods and Flood Damage
● Heavy rain
● Spring snowmelt
● Dam and levee failure
● Low absorption or no soil percolation
● Business and residential growth in flood
areas
Fl-2
2-2
CERT Basic Training
Unit 1: Floods
Factors Contributing to Flooding
● Rainfall intensity
● Rainfall duration
● Topography
● Soil conditions
● Ground cover
Fl-3
2-3
CERT Basic Training
Unit 1: Floods
Flood Hazards
● Heavy rainfall exacerbates problems with:
 Runoff
 Absorption
 Flood-control measures
● Ravine flooding can inundate downstream
areas
● In rocky and heavily paved areas, lack of
absorption can cause flash flooding
Fl-4
CERT Basic Training
Unit 1: Floods
Flood Risks
● Most communities have some risk of
flooding
● Damage increases with development in:
 Coastal areas
 Floodplains
Fl-5
5
CERT Basic Training
Unit 1: Floods
Flood Preparedness
● Know flood risk in area
● Prepare flood evacuation plan
● Obtain flood insurance if living in floodplain
● Keep important documents in water-proof
box
● Check portable radio for current
information and emergency messages
Fl-6
6
CERT Basic Training
Unit 1: Floods
Protecting Property
● Elevate furnace, water heater, and electric
panel
● Move furniture and other items to higher
level
● Install check valves
● Waterproof basement floor and walls
Fl-7
7
CERT Basic Training
Unit 1: Floods
If You Must Evacuate
● Do not walk, swim, or drive through flood
waters
● Stay off bridges over fast-moving water
● Keep away from waterways
● Pay attention to barricades
● Avoid storm drains and irrigation ditches
● Keep family together
Fl-8
8
CERT Basic Training
Unit 1: Floods
After a Flood
● Stay out of flooded areas
● Reserve telephone for emergencies
● Avoid driving, except in emergencies
● Wait for authorities to issue message that
it is safe to return
● Be aware that snakes and other animals
may be in your house
Fl-9
9
CERT Basic Training
Unit 1: Floods

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Hazard3-Floods-slides_Jan2011.ppt

  • 2. When Floods Occur ● Any time a body of water rises to cover what is usually dry land ● One of most common hazards  75% of Federally declared disasters ● May be local or widespread ● May develop slowly or fast Fl-1 CERT Basic Training Unit 1: Floods
  • 3. Causes of Floods and Flood Damage ● Heavy rain ● Spring snowmelt ● Dam and levee failure ● Low absorption or no soil percolation ● Business and residential growth in flood areas Fl-2 2-2 CERT Basic Training Unit 1: Floods
  • 4. Factors Contributing to Flooding ● Rainfall intensity ● Rainfall duration ● Topography ● Soil conditions ● Ground cover Fl-3 2-3 CERT Basic Training Unit 1: Floods
  • 5. Flood Hazards ● Heavy rainfall exacerbates problems with:  Runoff  Absorption  Flood-control measures ● Ravine flooding can inundate downstream areas ● In rocky and heavily paved areas, lack of absorption can cause flash flooding Fl-4 CERT Basic Training Unit 1: Floods
  • 6. Flood Risks ● Most communities have some risk of flooding ● Damage increases with development in:  Coastal areas  Floodplains Fl-5 5 CERT Basic Training Unit 1: Floods
  • 7. Flood Preparedness ● Know flood risk in area ● Prepare flood evacuation plan ● Obtain flood insurance if living in floodplain ● Keep important documents in water-proof box ● Check portable radio for current information and emergency messages Fl-6 6 CERT Basic Training Unit 1: Floods
  • 8. Protecting Property ● Elevate furnace, water heater, and electric panel ● Move furniture and other items to higher level ● Install check valves ● Waterproof basement floor and walls Fl-7 7 CERT Basic Training Unit 1: Floods
  • 9. If You Must Evacuate ● Do not walk, swim, or drive through flood waters ● Stay off bridges over fast-moving water ● Keep away from waterways ● Pay attention to barricades ● Avoid storm drains and irrigation ditches ● Keep family together Fl-8 8 CERT Basic Training Unit 1: Floods
  • 10. After a Flood ● Stay out of flooded areas ● Reserve telephone for emergencies ● Avoid driving, except in emergencies ● Wait for authorities to issue message that it is safe to return ● Be aware that snakes and other animals may be in your house Fl-9 9 CERT Basic Training Unit 1: Floods