Cyclone Fani is beginning to make landfall in eastern India.
The country's Meteorological Department says wind speeds will reach 195 km/h (121 mph) when the storm is at full force.
More than a million people in the state of Orissa have already been forced to leave their homes.
Several neighbouring states in India have also been put on high alert.

Trump vows no more attacks by Israel on Iran gas field
Saudi Arabia trust with Iran hard to 're-establish', foreign minister says
Kuwait Petroleum Corporation contains fire after drone hits refinery
QatarEnergy says several LNG facilities targeted by missiles, fires contained
Kuwait foils terror plot targeting vital facilities
