There are many causes of floods.
Some of the most common causes are:
WSR-88D radars graphically display detected precipitation on a map. Radar can show the location of the intense rainfall cores and estimate the duration of rainfall.
provide the most accurate method of measuring rainfall at a single geographic point.
Estimates of rainfall from satellite data are less direct and less accurate than either gauges or radar but have the advantage of high resolution and complete coverage over oceans, mountainous regions, and sparsely populated areas where other sources of rainfall data are not available.
Most flash flooding is the result of prolonged, heavy rainfall from typhoons or slow-moving thunderstorms.
Flooding is more common in low-lying areas such as plains and deltas.
Failure of manmade structures such as dams and clogging of drainage systems
Runoff is high in urban areas since much of the ground is covered by concrete. Vegetation lessens runoff, as it absorbs water and improves the ability of the ground to take in more moisture.
• Find out the frequency of occurrence of floods in the
locality.
• Know the flood warning system in your locality.
• If it has been raining hard for several hours, or steadily
raining for several days
• Watch out for rapidly rising water and help prepare the
family for evacuation.
• Switch off the electricity and lock the rooms after all
have gone out.
• Have a handy survival kit.
• Use a radio or portable, battery-powered radio for
updated information.
• Stay calm and keep updated with the status of the
situation and safely reminders on what to do and
where to go in case of evacuation.
• Do not attempt to cross flowing streams unless
assured that the water is below knee high level.
• Avoid areas prone to flash flooding and be cautious of
water-covered roads, bridges, creeks and stream
banks and recently flooded areas.
• Report broken utility lines (electricity, water, gas, etc.)
immediately to appropriate authorities.
• Ensure that electrical appliances are checked by a
competent electrician before switching them on.
• Avoid affected areas.
• Return home only when authorities indicate it is safe to do
so.
• Stay away from any building that is still flooded.