Rain

Given that the diameter of cloud droplets is typically less than 0.01 millimeter, it is estimated for the formation of a large raindrop diameter of 1 millimeter, it requires at least a million of small cloud droplets. Not always of a large cloud comes a big rain, but from a small - small. Near the equator, where the humidity is particularly high, even a small cloud can cause torrential rain. In this case, chilled raindrops or ice crystals falling from the clouds to grab a hot and small droplets near the ground. Therefore, the rainfall in such areas could continue for weeks and sometimes months. The most rainy place on earth - is the Hawaiian Islands. Here annually to each hectare of land pours 10 million buckets of water. There are places on earth where the rain does not happen for weeks or even months. It is Sahara Desert (Africa), the deserts of Chile and Peru (South America). Here the air is so dry and dehydrated, even if it's a little rain, it will evaporate before they reach the earth's surface.