The rescue effort was aided by a slackening of the monsoon rains that have caused the worst flooding in decades in Khyber-Pakhtoonkhwa province. But as floodwaters started to recede, authorities began to understand the full scale of the disaster.
“Aerial monitoring is being conducted, and it has shown that whole villages have washed away, animals have drowned and grain storages have washed away,” said Latifur Rehman, spokesman for the Provincial Disaster Management Authority. “The destruction is massive.”
The flooding, which the U.N. estimates has affected 1 million people nationwide, comes at a time when the Pakistani government already is grappling with a faltering economy and a war against the Taliban.
The United States announced Sunday that it would provide Pakistan with $10 million in humanitarian assistance, a high-profile gesture at a time when the Obama administration is trying to dampen anti-American sentiment in the country.
The 1,100 death toll from the flooding could go even higher since rescue workers have been unable to access certain areas, said Adnan Khan, a disaster management official.
Almost 700 people have drowned in the Peshawar valley, which includes the districts of Nowshera and Charsadda, and 115 others are still missing, Mr. Khan said.
The districts of Swat and Shangla also have been hit hard and have suffered more than 400 deaths, said Mujahid Khan, the head of rescue services for the Edhi Foundation, a private charity.
Residents of Swat were still trying to recover from a major battle between the army and the Taliban last spring that caused widespread destruction and drove some 2 million people from their homes. About 1 million of those were still displaced.
In Swat alone, the floods have destroyed more than 14,600 houses and 22 schools, said Mr. Khan.
Authorities have deployed 43 military helicopters and more than 100 boats to try to rescue some 27,300 people still trapped by the floods, said Mr. Rehman, the disaster management spokesman.
But some residents stepped up their criticism Sunday of the government’s response.
“The flood has devastated us all, and I don’t know where my family has gone,” said Hakimullah Khan, a resident of Charsadda town who complained the government has not helped him search for his missing wife and three children.
The military deployed 30,000 army troops who helped rescue more than 20,700 people, said Mr. Khan, the disaster management official.