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.

US targets three Iranian oil vessels after attack on Navy ships
Israel launches strikes on southern Lebanon
Indonesia's Anak Krakatau eruption halts flights, schools, fishing
Putin says US-Russia contacts beneficial as talks begin with Witkoff and Kushner
Chinese national rescued from Nepal tunnel 10 days after flash flood
US envoys Witkoff, Kushner arrive in Moscow for talks on peace in Ukraine
One dead, 11 people missing after mudslide in China's Jiangxi province
Philippine VP Duterte posts bail after arrest order for alleged grave threats
