
Click image to enlarge.

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An average typhoon produces an energy-quantity of
approximately 20 millions megawatts. It is told that this quantity
correspondents to the annual electric power production of the United
States. And the average rain-quantity of a typhoon reaches nearly half
of the rain-fall in Germany.
The westward or northwest to the Philippines moving typhoons appear
between July and November – mostly in the months of September and
October .
Often, whole provinces, sometimes the half island-archipelago suffer
under its effects. Particularly affected are the coastal-areas between
northern Luzon and the southern Visayas. The islands Samar and
Catanduanes as well as the province Bicol should be mentioned
especially.
The number of the typhoons increases on the Philippines. The cause
may be the increasing earth warming. In former decades round about 20
typhoons passed annually the Philippines. Now the span increased to
25–35 expected typhoons.
The 25–35 typhoons on the Philippines cause hundreds of dead,
injured or missed persons every year. High also the number of destroyed
streets and houses, evacuations, immense the damage through storm-tides
and landslides. Harvests, for example coconut harvests can suffer heavy
losses and a stronger erosion of soil is often the consequence. Since a
gust of 130 km/h can practice a pressure up to 400 kg per cubic meters,
roofs are torn away, trees get uprooted and electric- and telephone
lines can be destroyed.
Source: Wolfgang Bethge
(Wolfgang Bethge has an outstanding website about the Philippines)