The India Meteorological Department too confirmed that the landfall process started between 8:30 and 9:00 am on Wednesday.
People in Odisha, West Bengal and Jharkhand woke up to strong winds and heavy rain on Wednesday morning and braced for the cyclone.
As a precaution, Kolkata airport has closed for operations from 8.30 am to 7.45 pm and no flights will be operating to or from Kolkata, officials said.
Railways also announced the cancellation of 38 long-distance South-bound and Kolkata-bound passenger trains from 24 to 29 May in view of the impending cyclone.
Over 1.15 million (11.5 lakh) people were on Tuesday were evacuated from vulnerable areas in West Bengal to prevent deaths and injuries ahead of the impending landfall of the cyclone Yaas.
Two persons had been electrocuted and at least 80 houses damaged in Hooghly and North 24 Parganas districts due to strong winds and heavy rainfall on Tuesday.
West Bengal chief minister Mamata Banerjee had informed that 74,000 employees of the state government have been engaged in the relief work. Evacuated people have been moved to over 8,000 flood shelters and schools and colleges. She spent the night in the state secretariat, Nabanna, reviewing preparations for the cyclone.
Odisha chief minister Naveen Patnaik also held a meeting with chief secretary and special relief commissioner (SRC) through a virtual platform linking the state control room and cyclone dashboard. Patnaik sought the cooperation of people in evacuation and directed the administration to monitor the situation regularly.
The defence ministry has deployed 17 integrated Cyclone Relief Columns of Army, comprising specialised personnel with associated equipment and inflatable boats.