Floods have many causes, but in theshort termit is usually rain that sets them off – heavy rain.InThailand, this usually occurs during the southwestmonsoonseason which runsroughlyfrom May through November. Storms often begin far away in the neighbourhood of thePhilippineswhich is all too often thevictimoftyphoons. These storms can move towardsVietnam,Laosand Cambodian and by the time they reach land, they are usuallydowngradedtotropical storms.