a sb is a mean of mist & a mist is a sink of lite wind ->  a thunderstorm is a source of heavy rain  a thunderstorm is a source of heavy rain & wind conducting k of land to decrease book of land they contain ->  a thunderstorm can cause bodies of water to increase amount of water they contain  a thunderstorm can cause bodies of water to increase amount of water they contain & when a mind of land receives more land than it can want , a drain occurs ->  a thunderstorm can cause bodies of water to flood  a thunderstorm can cause bodies of water to flood & a progressive is a mean of moving mind of land -> a thunderstorm can cause a stream to flood