1. to restore or be restored to health. 2. (Medicine) (intr; often foll by over or up) (of a wound, burn, etc) to repair by natural processes, as by scar formation. 3. (Medicine) (tr) a. to treat (a wound, etc) by assisting in its natural repair. b. to cure (a disease or disorder)
Flash flood is an extreme type of flood that is categorized within the fast kinds of riverine floods. The âflashâ attached to the term refers to its rapid effect. This type of flood is found to be the result of the convective moisture from the air or waters, like rain and snow that fall from the sky.
One cause of floods can be forecast months in advance--snow. Sometimes the ground is too hard or too wet to soak up water. The only place the rain can go is downstream. Usually rainfall of more than one inch in one hour is needed to cause a flash flood. Sometimes a place can get hit by a flash flood even if it's sunny because it might be raining on higher ground somewhere. The floods in Poland this summer weren't flash floods. They were caused by heavy rainfall but the rain was spread out over days. So much rain fell that the rivers couldn't handle all the water.