Extreme heat intensifies across south-west US

LAS VEGAS, July 17: A heat dome over the US southwest has translated into extreme heat warnings from coast to coast, which continue to affect more than 110 million people. Temperature records could be broken in as many as 38 cities.

In Las Vegas, the intense heatwave is threatening on Sunday to break or tie the city's record high of 117F (47.2C). It comes as soaring temperatures are also hitting southern Europe and Canada is battling the worst season of wildfires in its history.