Onam is one of the greatest festivals of Kerala. It is the festival, which the keralites celebrate unitedly without the difference of caste and religion. Onam is a time for sports and festivities and in Kerala where one third of the area is low lying, covered with canals, lakes and backwaters; the people take to their boats and country crafts to celebrate. Colourful aquatic festivals are organized along the sacred rive Pamba.After three months of heavy rains, the sky becomes a clear blue and the forests a deep green. The brooks and streams come alive, spitting forth-gentle white foam, the lakes and rivers overflow and lotuses and lilies are in full bloom. It is time to reap the harvest, to celebrate and to rejoice. The harvest festival of Onam corresponds with the Malayalam New Year, Chingam.