About 7 million people in Texas – a quarter of the United States’s second-most populous state – have been told to boil their water or stop using it entirely as homeowners, hospitals, and businesses grappled with broken water mains, burst pipes and power outages resulting from winter storms. Al Jazeera reports that the cold snap, which has killed at least 21 people and has also shut in about one-fifth of the nation’s refining capacity and closed oil and natural gas production across the state, is not expected to let up until this weekend. Meanwhile photos circulating on Twitter late Wednesday claim to show Texas Senator Ted Cruz leaving the state on a flight to Cancun, Mexico, though nothing has yet been confirmed.