(CNN) -- International Monetary Fund officials will meet with members of the Pakistani government in Washington next week to discuss the economic impact of the massive floods that have ravaged the country.
"The floods which have hit Pakistan in recent weeks and brought suffering to millions of people will also pose a massive economic challenge to the people and government of Pakistan," said Masood Ahmed, director of IMF's Middle East and Central Asia Department.
Ahmed says the meeting will be an opportunity to evaluate the economic impact of the floods, assess what Pakistan's government is doing to respond to it and "discuss ways in which the IMF can assist Pakistan at this difficult juncture."
The massive flooding that has covered about one-fifth of Pakistan has claimed the lives of more than 1,500 people, authorities said Saturday.
More than 200 health facilities have been damaged or destroyed, according to the World Health Organization, greatly reducing the available health care for millions of survivors in filthy conditions. At least 4 million people are homeless.
U.N. officials have appealed for $460 million over the next three months to help the roughly 20 million people in need of shelter, food and emergency care.
The United Nations has received about $263 million and an additional $54 million in pledges -- or about 70 percent of its goal, said Maurizio Giuliano, spokesman for the U.N. Office for the Coordination of Humanitarian Affairs.