Media playback is unsupported on your device

California drought to worsen, Nasa predicts

27 August 2014 Last updated at 14:14 BST

California has been hit by its worst drought in a century, leaving hundreds of households and landowners without water.

Authorities are drilling deeper and more often in search of ground water, but with little success.

Now experts say the problem is set to worsen, with Nasa scientists predicting the dry conditions could become "the new normal".

Alastair Leithead reports.

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.