Between the months of November and May, a wind blows from the west in most part of Indonesia. It comes from ocean and carries rain. Clouds build up around the mountains, and every afternoon rain falls. The rain is always heavy, and rivers now become dangerous. When it rains the whole day, they may suddenly overflow and cause great damage to the land. Most farmers are glad when the wet season begins. There is water for their fields and they can again start growing rice. But people in town are not so glad for the streets soon get muddy and dirty. They prefer the dry seasons when they can sit outside and enjoy cool evening.