Cyclone Yaas, which began its landfall on Wednesday morning near Dhamra port in Odisha, has completed the process, the India Meteorological Department (IMD) said.
West Bengal chief minister Mamata Banerjee, whose state is also in storm's path, said that at least 1 crore people have been affected and three lakh houses damaged due to rough weather conditions arising out of the cyclone.
"Cyclone Yaas has complete the process of landfall. Rainfall will continue till tomorrow. Fishermen are advised not to venture till tomorrow morning because the sea condition going to be rough," said Umashankar Das, senior scientist, Meteorological Centre, Bhubaneswar.
IMD director general of meteorology, Mrutyunjay Mohapatra, said earlier in the day that the cyclone is likely to reach Jharkhand on Thursday morning.
According to IMD estimates, Yaas will gradually weaken into a severe cyclonic storm in the next three hours and into a cyclonic storm during the subsequent six hours.
Meanwhile, Mamata Banerjee held a review meeting with district magistrates, disaster management committee and other officials in West Bengal. Later, addressing the media, she said that Bengal happens to be the "most-affected state".