Millions of people in Texas are bracing for extreme temperatures over the weekend just days after a tornado killed three people in the state.
Temperatures have been climbing since Thursday, when a major storm system swept the southern US, also causing deaths in Florida and Mississippi.
Power is out for 400,000 customers in the South as of Friday evening.
Officials warn that the brutal heat will strain power grids as residents run their air conditioners.
The extreme temperatures come as the US prepares to celebrate the Juneteenth holiday on Monday, a federal holiday.
The National Weather Service (NWS) issued a heat advisory until Sunday, warning people in Texas that temperatures could feel as hot at 110F (43C) at times.
Cities across Texas have opened up cooling centres for vulnerable residents.
"Anyone ready for Winter yet?" NWS forecasters posted on Twitter on Friday, adding that heat records are expected to be broken over the weekend.
As the danger of storms subsides on Saturday evening, the risk of extreme heat across the region will remain, the NWS said.
The heat comes with a week to go before the summer season officially begins on 21 June.
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