The US assistance to the flood-affected areas of Pakistan has totalled $76 million, the State Department said.
"As of this morning, the additional money that the US is providing is to Save the Children, and that's $4.1 million. That will be used for food vouchers enabling flood victims to purchase food in their local markets," department spokesman Mark Toner said on Thursday.
Toner also said the 19 helicopters ordered by Defence Secretary Robert Gates to help the affected population will be in place over the next few days.
The US has recently announced several aid packages to Pakistan as the country encounters one of the worst floods in its history.