Typhoon Ondoy struck the Philippines in September 2009, causing widespread flooding that affected over 872,000 people and resulted in 241 deaths. Hydrometeorological hazards are atmospheric phenomena such as typhoons, thunderstorms, flash floods, and storm surges that can cause loss of life or property damage. A typhoon forms over warm water and is characterized by strong winds that rotate inward toward the eye of the storm.

1. Hydro-
meteorologic
al Hazards

2. •Do you
remember
this incident?
• Where are
you when it
happens?

3. Typhoon
#16
(Ondoy)
September 24, 2009 – September
30, 2009
struck southwest Luzon in the Philippines. Flood
disasters caused by this heavy rainfall affected
872,097 people throughout the entire
metropolitan area, causing 241 fatalities, 394
injuries, and damaging 65,521 buildings

4. • Hydrometeorologi
cal hazards is a
process or
phenomena of
atmospheric
nature that cause
loss of life and
property or
environmental
damage

5. They are different type
of hydrometeorological
hazards
•Typhoon- A severe
weather
disturbance with a
strong wind and
heavy rainfalls
which form in a
low-pressure area

6. A typhoon
• forms when the wind blows in
warm water. This wind collects
moisture and rises while the colder
moves below. This process creates
pressure that causes the wind to
move quickly. The wind rotates to
the canter that called an eye and
the more moisture and warm air
the more intense the wind

7. Thunder
storm
•- A transient type of weather
disturbance produced by
cumulonimbus clouds, usually with
lightning, thunder and intense
rainfall

8. Flash flood
•A flood characterize by
the great volume of
water caused by heavy
rainfall in a short period.
It occurs within minutes
or hours .

9. Flood
•- A great flowing of
water on the land
that is not usually
submerged. A flood
occurs when water
flows to the land
faster than it absorbs

10. Storm surge
•a Localized
unusual increase
of seawater
beyond
astronomical tide
due to intense
wind and tropical
cyclone

11. El Niño
•the unusual warming of sea
surface temperature occurs
in the central and eastern
equator of pacific.
•This phenomena usually last
up to 9 months to 2 yrs. The
word El Niño is a Spanish
word meaning “Christ
child/the boy” or Jesus.

12. La Niña
•the Spanish word for
“the girl” the
opposite of El Niño
the unusual cooling
of the sea surface in
the central and
eastern pacific it may
last 1-3 yrs.

13. 1. What is
the
meaning of
the word
La Niña?
A. The Boy
B. the Father
C. The Girl
D. The Mother

14. 2. It is the
unusual
warming of sea
surface
temperature
occurs in the
central and
eastern equator
of pacific
A. El Niño
B. Flood
C. Thunderstorm
D. Storm surge

15. 3. A Localized
unusual increase
of seawater
beyond
astronomical tide
due to intense
wind and tropical
cyclone.
A. El Niño
B. Flash Flood
C. La Niña
D. Storm surge

16. 4. The
following are
impending
signs of
Typhoon
except
A. Barometer start to drop
B. Dark clouds
C. Strong Wind
D. Temperature drop

17. 5. What is the
meaning of the
word El Nino?
A. The Boy
B. The Brother
C. The Man
D. The Woman

18. 6. A transient
type of weather
disturbance
produced by
cumulonimbus
clouds, usually
with lightning,
thunder and
intense rainfall
A. El Niño
B. Flood
C. Thunderstorm
D. Storm surge