Cyclone Dana is expected to hammer the low-lying regions of West Bengal and Odisha, home to around 150 million people, as a “severe cyclonic storm” late on Thursday or Friday morning, India’s weather bureau said. At least 1.1 million people on India’s eastern coast were fleeing to storm shelters inland, just hours before the storm’s arrival.

Indian authorities have shut schools, evacuated hundreds of thousands of people and cancelled trains in parts of the country as rescue teams braced on Thursday for a tropical storm brewing in the Bay of Bengal.

Over a million people have been evacuated and flights and trains have been suspended as India’s eastern regions and Bangladesh braced for a severe cyclone. Cyclone Dana is expected to hammer the low-lying regions of West Bengal and Odisha,