Paying for water delivered by truck is part of the daily routine for many inhabitants of Nuevo Pachacutec

As UN negotiators meet in Lima to work out a plan for dealing with rising temperatures, Matt McGrath visited a community paying a high price for water supplies threatened by climate change and increasing demand. Is Peru's experience a sign of things to come?

Snarling and screeching, the bouncing water truck speeds backwards down the steep hill, in a cloud of coarse dust.

It halts with a judder and a wild eyed, sweaty man jumps from the cab, grabs a large plastic pipe on the back and starts to fill a series of plastic containers on the ground, with little care.

Dressed in bright pink, a woman looks on nonchalantly.

The man runs up to her and holds out his hand. She drops some coins and away he goes, jumping onto the running board of his vehicle, already snorting its way to the next stop.

This is daily routine for tens of thousands of people who live in this sprawling hillside settlement that looks down on the Pacific Ocean, less than an hour north of Lima, Peru.

Water in Nuevo Pachacutec is not just the vital substance for life, it is a measure of social status and progress.

Image copyright Matt McGrath Image caption The sprawling hillside settlement is less than an hour north of the Peruvian capital Lima

Image copyright Matt McGrath Image caption Water in Nuevo Pachacutec is not just the vital substance for life, it is a measure of social status and progress