'Temperatures are breaking records'
30 June 2013 Last updated at 03:48 BST
Dozens of people across western US states have been treated for exhaustion and dehydration, as the region is continuing to bake in a heatwave.
Air-conditioned "cooling centres" have been set up in California, Nevada and Arizona, as officials warn the heat could be life-threatening.
Temperatures in some areas are expected to be near 54C (130F) - close to the world's all-time record.
Spencer Lubitz a reporter with KNTV in Las Vegas spoke to BBC News about the effect of the extreme heat.