Contents: Thunderstorm Flooding El Nino La Nina

1. DISASTER READINESS AND
RISK REDUCTION
SHS CORE SUBJECT
80 HOURSE/SEMESTER
PREREQUISITE: GRADE 3 – 10 SCIENCE
Sir Dexter B. Cargullo
CHS,Tabaco City

2. This presentation contains videos. To get the actual
PowerPoint presentation, send an email to the
author.
sirdikoy@gmail.com

3. HYDROMETEOROLOGICAL
Hazards
PART 2

4. “are processes which involve the interaction of the
atmosphere, bodies of water, and land, and which
pose threats to lives and human property.”
HYDROMETEOROLOGICAL
HAZARDS

5. Thunderstorm
A thunderstorm is a violent, transient type of weather
disturbance associated with thousands of meters tall
cumulonimbus clouds and which usually involves
lightning and thunder, strong winds, intense rainfall,
and occasionally tornadoes and hail.

7. Thunderstorm
Hazards associated with Thunderstorm
1. Lightning
2. Hail
3. Tornadoes
4. Flash Floods

8. Flooding
”the abnormal rise of water level in rivers, coastal
areas, plains, and in highly urbanized centers which
may be a result of natural phenomena, human
activities, or both.

9. Flooding (P. Types)
Riverine
When the level of water flowing through rivers
increases and goes beyond the average water level, or
worse, further encroaches levees.
Cause: Extreme and sustain rainfall

10. Flooding (P. Types)
Estuarine and Coastal
When seawater encroaches low-lying land that is
usually still above sea level.
Causes:
*storm surges
*astronomical high tide

11. Flooding (P. Types)
Urban Flooding
Usually occurs in highly populated, developed areas
set on relatively low-lying areas like valleys and
A result of:
*saturation of ground due to too much rainfall
*presence of large areas of impermeable surfaces like concrete
pavements and rooftops.

12. Flooding (P. Types)
Catastrophic Flooding
“flooding due to ground failure and/or major
infrastructure failure.”

13. Flooding (P. Types)
Flash Floods
“a rapid, short lived, and violent arrival of a large
volume of water which can be caused by intense
localized rainfall on land that is saturated or unable
absorb water.”

14. Effects of Flooding
1. Loss of lives and damage to amenities and loss of
access to basic necessities.
2. Power loss
3. Domestic and potable water loss/shortage.
4. Risk of acquiring waterborne diseases.
5. Economic hardships.

15. Flooding
Mitigating Flood Hazard
1. Flood hazard assessment and mapping
2. Flood prediction
3. Flood forecasting and warning
4. Flood-control engineering measures

16. Flooding
Mitigating Flood Hazard
Flood hazard assessment and mapping

17. Flooding
Mitigating Flood Hazard
Flood controls

18. What to do BEFORE, DURING, and AFTER a
Flood?
Long before the flood
1. Find out if your area is prone to flooding on existing
flooding map prepared by MGB.
2. Have an easily accessible emergency flood kit always
prepared.
*include: flashlight, batteries, first aid kit, radio, clothes,
blankets, towels, bottled water, ready to eat foods.

19. What to do BEFORE, DURING, and AFTER a
Flood?
Before an impending flood
1. Tuned in to news in television and radio for updates,
flood warnings, evacuation alerts.
2. Gather/call all family members to inform them of
impending flood.
3. Place important/delicate personal property to higher
ground to avoid damage.

20. What to do BEFORE, DURING, and AFTER a
Flood?
During the flood
1. Avoid having to walk/drive through floodwaters.
2. Wear boots to avoid being electrocuted.
3. Turn off gas lines/cooking gas tanks
4. Shutdown electricity form control panels
5. Turn off water gauge valve to prevent any possible
harm/damage and potential cost if left unmonitored
during evac.

21. What to do BEFORE, DURING, and AFTER a
Flood?
After the flood
1. Take precautions against risk in entering property
that may have been structurally compromised and
contaminated.
2. Document the damage to your property.

23. El Nino
El Niño means The Little Boy, or Christ Child in
Spanish. El Niño was originally recognized by
fishermen off the coast of South America in the
1600s, with the appearance of unusually warm water
in the Pacific Ocean. The name was chosen based on
the time of year (around December) during which
these warm waters events tended to occur.

24. El Nino
The term El Niño refers to the large-scale ocean-
atmosphere climate interaction linked to a periodic
warming in sea surface temperatures across the
central and east-central Equatorial Pacific.
The presence of El Niño can significantly influence
weather patterns, ocean conditions, and marine
fisheries across large portions of the globe for an
extended period of time.

25. El Nino

26. La Nina
 La Niña means The Little Girl in Spanish. La Niña is also
sometimes called El Viejo, anti-El Niño, or simply "a cold
event."
 La Niña episodes represent periods of below-average sea
surface temperatures across the east-central Equatorial
Pacific. Global climate La Niña impacts tend to be opposite
those of El Niño impacts. In the tropics, ocean temperature
variations in La Niña also tend to be opposite those of El
Niño.
 During a La Niña year, winter temperatures are warmer than
normal in the Southeast and cooler than normal in the
Northwest.

27. La Nina

28. La Nina