Rain cats and dogs

A few days ago I saw mbc nine p.m news ,according to the news  this year the rainy season begins in june in korea. Last year especially gangwon province was damaged by a heavy rain.In gangwon province there are many house located nearby mountain, in this area often occur the crumbling of a mountain during rainy season.So there are many sufferers from a flood,some people die,or other many people lose theirs fortune.This phonomenon occur every time during the rainy season.For example, seoul have a many brideges; dong-jac bridge and han-nam bridge,jam-soo bridge,sung-san bridge and so on.Especially jam-soo bridge is soaked in water during the rainy season,because this bridge is very low unlike other bridge.In rurar area farmers suffer from lose of their farm products. So during this season farm products to be scarce,therefore farm products price soar, that is to say farm products more expensive than  during other  season. Ah! rain cats and dogs mean that heavy rain especially during the rainy spell in summer. I think that maybe  many students know about rain cats and dogs meaning.