The United Nations is appealing for more than $15 million to help thousands of people affected by flooding in Pakistan.

The country's National Disaster Management Authority says at least 370 people have been killed and 4.4 million affected by floodwaters that have swept through Sindh, Punjab and Baluchistan provinces in recent weeks.

On Friday, the U.N. Children's Fund said it urgently needs $15.4 million to “scale up its water, sanitation and hygiene response to reach about 400,000 people over the next three to six months.”

UNICEF says it has begun reaching 183,000 flood-affected people with safe drinking water. Families have also been receiving hygiene kits and water buckets to prevent the outbreaks of water-borne disease.

The U.N. agency says 1.4 million children have been affected by the recent floods.

In 2010, Pakistan was hit by the worst floods in its 65-year history, with at least 1,700 people killed and 20 million affected.

UNICEF Deputy Pakistan Representative Karen Allen said Friday, “some of the affected children are living in areas that are experiencing devastating flooding for the second or third time over the past three years, and these new floods have disrupted their recovery.”

Allen called on the international community to help the aid agency meet the needs of flood victims.