India, July 20 -- The Army on Monday joined rescue operations while the Indian Air Force (IAF) and central forces were on standby as the flood situation in Assam deteriorated following incessant rainfall over the past four days.

The India Meteorological Department said thunderstorms and rain were expected across most of Assam on Monday. It has forecast heavy rainfall for Golaghat, Sivasagar, Charaideo, Dibrugarh and Tinsukia. The intensity of rainfall is expected to decline from Wednesday. Low to moderate flood alerts have been issued for Sivasagar, Charaideo, Jorhat, Golaghat, Chirang, Dibrugarh and Tinsukia.

Assam State Disaster Management Authority (ASDMA) said 580 villages have been affected and over 10,362 hectares of crop remained...