Tamil Nadu: Chennai has already been witnessing heavy rainfall through the week. Cyclone Maha brewing over the Arabian sea is set to have adverse effects on Tamil Nadu for the next 48 hours causing heavy rains. 

Bulletins put out by the Indian Meteorological Department stated, "Light to moderate rainfall at most places with heavy falls at isolated places very likely over Kerala, Lakshadweep, coastal Karnataka and south Tamil Nadu during the next two days. Extremely heavy rainfall at isolated places are likely over Lakshadweep Islands and heavy to very heavy rains at isolated places over Kerala during the next 48 hours. Heavy to very heavy rains at isolated place are also likely over Tamil Nadu during the next 12 hours and over coastal Karnataka on October 31."

Tamil Nadu has received a 14% excess rainfall this year.

Heavy to very heavy rainfall warning has been issued and fishermen have been warned against venturing into the sea. 

According to The Indian Meteorological Department, the deep depression in the Arabian sea intensified into cyclonic storm "Maha" on Wednesday. 

It would be the fourth cyclone in the Arabian Sea after 'Vayu', 'Hikka' and 'Kyarr'. 

The Met Department said the sea conditions would be "rough to very rough" over Comorin-Maldives area and along the Kerala and Karnataka coasts in the next 48 hours.