Millions in US under warnings as record heat expected to continue next week

South-west and parts of the west hardest hit amid warnings to take heat seriously' as Phoenix temperature to rise to 118F Sunday

More than 100 million people, around a third of Americans, were under extreme heat advisories this weekend and that record-breaking heat was expected to continue into the new week.

There were advisories from coast to coast, with the south-west and parts of the west hard hit and officials warning that conditions could get worse in Arizona, California and Nevada.