Heavy rain continues to wreck havoc as south west monsoon intensified across all districts in Kerala today. Out of the seven fishermen who went missing after venturing  into the sea from Vizhinjam and Neendakara, four returned safely today. It is reported that they returned to the harbour in the same fishing boat in which they set off to the sea.<br />'' <br />''Shutters of several dams in Idukki and Kozhikode districts were opened. Around 500 people have been shifted to relief camps.As heavy rain continued to lash Idukki district, authorities have warned people residing on the banks of Periyar river to exercise caution. Meanwhile, the death toll remains two in rain related incidents.