Flash floods are a sudden, destructive surge of water caused by heavy rainfall that can occur with little to no warning. They are the leading cause of weather-related deaths in the US, killing over 140 people annually. Slow-moving thunderstorms or storms repeatedly moving over the same area are common causes of flash floods, which can turn city streets into rivers within seconds. Flash floods damage property, endanger lives, erode soils, delay traffic, and cause financial losses. Proper drainage maintenance and flood control infrastructure like dams and levees can help mitigate flood risks.

1. Reporter:
Shaina Mavreen D. Villaroza
IV – Electron
Health 4

3. Flash Flood
 A sudden and often destructive surge of water
down a narrow channel or sloping ground, usually
caused by heavy rainfall.

4. Flash Flood
 Flash flooding is the number one cause of deaths
associated with thunderstorms, claiming more than
140 lives each year.
• Flash floods can strike any time with little or no
warning. City streets can become rivers in seconds.

5. Causes of Flash Flood
 Caused by slow-moving thunderstorms,
thunderstorms repeatedly moving over the same
area, or heavy rains from hurricanes and tropical
storms.
 Blocked catch basins, storm drains, water main
breaks, and sewer lines can also lead to flooding.

6. Effects to the Environment
 Damage property
 Endanger lives of humans
 Soil erosion and sediment deposition problems
 Delay traffic
 Interfere with drainage
 Sewer outfalls
 Impaired navigation and hydroelectric power
 Financial losses

7. Clogging
 Keep your local drains clear of litter and debris
to avoid blocked drains that can cause floods.
Even if the debris doesn’t block your own
drains, it could be swept downhill and cause
flooding elsewhere.

8. Clogging
 To prevent clogging,
throw your garbage properly and
clean up drains.

9. Resolution of the Issue
 The basic methods of flood control have
been practiced since ancient times. These
methods include reforestation and the
construction of levees, dams, reservoirs, and
floodways (artificial channels that divert
floodwater).

10. Kariba Dam

11. Blocked drain blamed for Orchard
Road flood

12. Other Types of Flooding
River Flooding
Coastal Flooding
Urban Flooding

13. ~End~
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listening!
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