Tens of thousands of people have reportedly been displaced in days of fighting between Iraqi forces and the self-proclaimed Islamic State in Fallujah.
Aaid workers in a temporary camp outside Fallujah say they are struggling to cope with the arrivals amid an unfolding humanitarian crisis.
The Norwegian Refugee Council estimates up to 42,000 people have fled Fallujah since the start of an Iraqi-led military campaign against IS late last month.
And other organisations reportedly say the number might be up to twice that many.
The Norwegian agency says it believes 30,000 have left the besieged city in the province of Al-Anbar just in the last few days.
The Refugee Council is one of a number of aid organisations that have sent teams to a temporary camp sheltering the displaced in Amiriyat, 30 kilometres south of Fallujah.
Regional spokesman Karl Schembri has told Al Jazeera English that people arriving in Amiriyat are in desperate need of help.
"These come out of months of besiegement whereby no essential, no basic, supplies have been coming through to the city centre of Fallujah, or the outskirts even. Food, medicines, water - drinking water. They've been eating rotting dates and animal feed and drinking from the river."
Karl Schembri says his and other aid groups in Amiriyat are overwhelmed by the number of arrivals and are no longer able to provide the required help.
He warns drinking water and other supplies are running out fast and says, unless they are replenished soon, conditions in the camp will worsen drastically.
"We are concerned. Right now, as we speak, there are thousands without any tents, without any shelter. They have slept overnight out in the open. They are now stranded out there in a sandstorm under the scorching sun, without any protection. And the question of latrines, toilets and sanitation. If we don't get those in order in the next hours, it is going to be catastrophic."
The Norwegian Refugee Council is calling on the Iraqi government to take charge of what it says is an unfolding humanitarian disaster.
And it has renewed a call for all warring sides to allow safe passage for charities to deliver aid to thousands of civilians still thought to be trapped in Fallujah.
Fallujah became the first Iraqi city to fall to IS in early 2014, before the group declared a caliphate across Iraq and Syria.
The city is regarded as the last major IS foothold in the region, and Iraqi military officials says the militants have now been driven out from most of the city.
Iraqi forces, backed by allied fighters and United States war planes, are continuing the push to secure full control of Fallujah.
Military commander Major General Saad Harbiyah says troops on the ground have entered some of Fallujah's most critical hubs.
"We are at the city centre, at the main intersection between districts of Nazal and the industrial area. Our forces will liberate all the other areas."
The Iraqi government says recapturing Fallujah paves the way for the next battle, to take back Mosul in the north.
Mosul is the country's second-largest city and a key point still under IS control.
