Heavy monsoon rains have triggered a major flood crisis across Assam and neighbouring Arunachal Pradesh, leaving more than 22,000 people affected and causing widespread destruction. Dhemaji has emerged as the worst-hit district, with 96 villages submerged, nearly 1,690 hectares of cropland damaged, and more than 48,000 livestock affected. A railway bridge over the Simen River, built in 1965, partially collapsed due to severe riverbank erosion, forcing the suspension of train services between Archipathar and Simen Chapari.