The United Nations agency for refugees is launching a major aid operation to reach more than half a million people displaced by fighting in northern Iraq.
Supplies will be sent via airlift, road convoys and sea shipments through Turkey, Jordan, the United Arab Emirates (UAE) and Iran.
A BBC correspondent at Mosul Dam says Kurdish and Iraqi forces have retaken it from Islamic State (IS) militants.
IS forces have captured large parts of northern Iraq in recent weeks.
The UN's World Food Programme says it has already served up more than a million meals to displaced people in the past two weeks alone.
Tents and other goods will be included in the aid packages to be delivered to refugees to try and tackle the escalating humanitarian crisis.
Over the weekend, the UN agency for children Unicef stepped up their aid efforts for minority Yazidi refugees in northern Iraq.
Unicef representative Marzio Babille told the BBC it was one of the largest humanitarian responses he had seen in 50 years.
In Dohuk, 80,000 refugees had arrived in only 10 days, fleeing from IS militants.
The aid push comes as Western powers step up efforts to stem the advance of IS by supporting Kurdish and Iraqi government forces in northern Iraq.
US President Barack Obama says IS militants are "a threat to all Iraqis and the entire region"
On Monday, US President Barack Obama said that the Mosul Dam in northern Iraq had been recaptured by Kurdish forces, a key gain against the militants who had earlier taken control of it.
Mr Obama said the US helped in the operation with air strikes targeting IS positions around the dam, Iraq's largest.
He said the move was a "major step forward", and the US had begun a long-term strategy to defeat the militants, including the building of a humanitarian "international coalition" in response to the crisis faced by refugees.
The statement followed Iraqi claims that the dam had been "fully cleansed", with IS saying it was still in control.