In pictures: Deadly Kashmir floods
The worst floods in Indian-administered Kashmir in half a century have killed at least 150 people and left the main city of Srinagar under water, as residents are evacuated or retreat to their rooftops.
Some 350 villages are also under water after late-monsoon rains hit the region. Across the border, in Pakistan, floods and house collapses have left more than 180 people dead.
Five days of heavy rain abated over the weekend, but flood waters in Srinagar have risen dramatically. The Jhelum river has flooded large parts of the city and forced residents onto rooftops.
Residents have waded through neck-deep waters with their belongings. Kashmir's Chief Minister Omar Abdullah said the floods were "unprecedented" but urged residents not to panic, saying rescuers would eventually reach them.
A police official in Srinagar told the AFP news agency that he feared the extent of the devastation was not yet known because phone networks were down and areas cut off. The army headquarters is also under water along with some government buildings.
"Many people may have died and houses collapsed but we are not getting to know much," the police officer said, describing the situation as "catastrophic".
The flooding is being described as the area's worst in five decades.
India's defence ministry said thousands of soldiers, backed by 25 helicopters and seven aircraft, are engaged in rescue work and delivering blankets, tents and other relief across the Kashmir valley. More than 14,800 people have been rescued so far, and 50 army medical teams have been deployed, the ministry said.
Touring the region, Indian Prime Minister Narendra Modi declared the floods a "national level disaster" and promised almost $200m in aid and compensation. Mr Modi has also written to his Pakistani counterpart, Nawaz Sharif, offering his "deepest sympathies" to flood-hit victims on that side of the border and offering help.
Australia beat India to reach final