Cyclone Yaas intensified into a very severe cyclonic storm on Tuesday evening, India Meteorological Department Director General M Mohapatra said.
The IMD has also issued a red-coded warning alert to the Odisha and West Bengal coasts.
"The severe cyclonic storm 'Yaas' (pronounced as 'Yass') over northwest and Bay of Bengal intensified into a very severe cyclonic storm," Mohapatra said.
It is very likely to move north-northwestwards, intensify further and reach near north Odisha coast close to Dhamra, over 350km from Calcutta, port by the early morning of Wednesday.
"It is very likely to cross north Odisha-West Bengal coasts between Paradip and Sagar Islands close to north of Dhamra and south of Balasore, during noon of Wednesday, the 26th May as a Very Severe Cyclonic Storm," the Cyclone Warning Division of the IMD said.