This page is dedicated to providing both descriptions and movies of each object in an attempt to help clarify the differences. Here's a great place to start. Among other things, this place has plenty of links. Several factors contribute to flash flooding. The two key elements are rainfall intensity and duration.
Intensity is the rate of rainfall, and duration is how long the rain lasts.
For more information, check this site out. Frostbite - Frostbite is a thermal injury to the skin which can result from prolonged exposure to moderate cold or brief exposure to extreme cold. When skin is exposed to the cold, blood vessels in the skin clamp down or constrict. As a result of a decreased blood flow to the skin, the fluid in and around skin cells develops ice crystals. This causes frostbite to occur.