The South-West monsoon has set in over Kerala today, three days ahead of  normal date of onset.<br />''<br />''The IMD had earlier forecast the South-West monsoon over  the State on the 27th with an error margin of four days.<br />''<br />''Normally the onset of monsoon will happen on the First of June in Kerala.<br />''<br />''According to reports, several parts of Kerala have been receiving moderate to heavy rainfall in the past few days.<br />''<br />''The  pre-monsoon showers accompanied by lightning and thunderstorms  have hit normal life in Kerala, besides  causing widespread destructions to standing crops in recent months.<br />