Super Cyclone Amphan, likely to make landfall in West Bengal tomorrow afternoon, has weakened into an extremely severe cyclonic storm, triggering heavy rain and gusts of wind in Odisha and rain in some parts of Bengal. National Disaster Response Force (NDRF) chief SN Pradhan today told reporters they face the "double challenge" of the coronavirus pandemic and a natural disaster. West Bengal Chief Minister Mamata Banerjee said she will ask the railways to stop running special "Shramik" trains for migrants to the state till Thursday. The cyclonic storm is likely to cross West Bengal's Digha and Bangladesh's Hatiya tomorrow.