Time is running out for the people of Aleppo.
Up to two million people are living under constant bombardment of barrel bombs dropped from government aircraft and Russian airstrikes.
Homes, schools and hospitals have been hit.
There's no clean water.
Displaced Syrian Omar Abo explains.
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"We need water. The children travel 3 to 4 kilometres to get water - sometimes they find it, other times they don't. If we need the toilet, we need to walk one kilometre - it's far from us. We can't find water to wash our children. This is not a life. We're in need of everything."
Thousands of Syrians fleeing the violence are in a camp in the village of Shimarian, in the northern countryside of Aleppo.
Once and a while a water truck arrives.
Children run after it on the dirt road, eager for a taste of fresh clean water.
Mahmoud Al Khaled knows just how difficult life is without it.
"The water is not usable, it's far and it's full of diseases. It's not suitable for tea or for drinking. It's not usable. It caused diarrhoea in children. We have to take them to the hospital because of it. And it's so far - we need it to be available."
The UN's Under-Secretary-General for Humanitarian Affairs and Emergency Relief Coordinator, Stephen O'Brien, says the situation is unacceptable.
"I'm very angry. As the UN's Humanitarian Chief, this callous carnage that is Syria has long since moved from cynical to sinful. What is happening in Aleppo today and throughout Syria over the last five years is an outrage against every moral fibre in our being as human beings, as fellow human beings, with every Syrian caught up in this unending cataclysm. And it is the failure of politics, of all of us, and you know this as members of the Security Council, so please now, now is the moment, this instant to put our differences aside and to come together as one and stop this humanitarian shame upon us all, once and for all."
The UN is calling for a commitment from all parties fighting in Aleppo to abide by a 48-hour humanitarian truce.
Russia has agreed, but the UN is waiting for an official response from others, including the US-led coalition.
"While this statement is positive, this cannot be a one-sided offer. I have consistently said that any pause also needed to include the clear security assurances from all parties to the conflict."
Last week, UN Secretary-General Ban Ki-moon warned of an unprecedented "humanitarian catastrophe" in Aleppo and urged Russia and the United States to quickly reach a deal on a ceasefire in the city and elsewhere in the country.
But fighting continues across Syria.
In the northeastern city of Hasaka, the Kurdish YPG have launched a major assault to seize the last government-controlled areas.
The fighting in Hasaka has been the most violent confrontation between the Kurdish YPG and the Syrian army in more than five years of civil war.
And in Jarablus - near Aleppo, close to the border with Turkey - local council members are calling for help.
"The local council of Jarablus calls on the Free Syrian Army of all its factions and its military faction in particular to set the area free and help the area's residents get rid of IS."
Meanwhile London-based rights group, the Syrian Observatory for Human Rights, says 16 people, including several children, were killed in airstrikes in several Syrian provinces on Monday.
