Many residents who managed to keep their power on now face electricity bills of thousands of dollars.
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The mayor of Houston has called for the state of Texas to pay the – in some cases – astronomical electricity bills racked up by residents in last week’s freezing weather.
“The bill should go to the state of Texas,” Houston’s Sylvester Turner told CBS News.
Some residents have reported bills in excess of $16,000 (£11,500) for a few days of usage.
Temperatures plummeted to 30-year lows, hitting 0F (-18C).
Much of Texas, which normally enjoys milder winter weather, was blanketed in snow.
The unusually cold weather across several southern US states claimed at least 70 lives.
Texas is recovering from the freezing temperatures, but many residents still have to boil water due to fears of contamination caused by low mains pressure.
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Millions of Texans suffered power outages. Electricity supplies have largely been restored in the state, but just under 30,000 customers were still without power on Sunday afternoon, according to Poweroutage.us.
Texas has a deregulated energy market allowing consumers to chose between a number of suppliers. Most are on fixed-rate payment plans, but as temperatures plummeted many on variable-rate tariffs were faced with soaring costs.
The Electric Reliability Council of Texas, which oversees the power system for most of the state, is being accused of not being prepared for the shortages.
Dallas resident and US Army veteran Scott Willoughby told the New York Times that he faces a $16,000 bill which had obliterated his savings.
Mayor Turner told CBS that when he was in the state legislature, he had filed a bill to ensure there was “adequate reserve” to prevent blackouts, but it was not considered by the state’s leaders.
The mayor of the country’s fourth largest city suggested the system was not up to the challenges of storms produced by climate change.
“All of this was foreseeable. I wrote about it in 2011. And so for these exorbitant costs, it’s not the consumers who should assume those costs.
“They are not at fault for what happened this week.”
Fort Worth Mayor Betsy Price also told CBS that help with bills should come from Texas and the federal government.
Texas Governor Greg Abbott has called for action to ensure Texans “do not get stuck with skyrocketing energy bills”.
“We have a responsibility to protect Texans from spikes in their energy bills that are a result of the severe winter weather and power outages,” he said after meeting lawmakers.
President Joe Biden declared a major disaster in Texas on Saturday, clearing the way for more federal funds to be spent on relief efforts.
“Assistance can include grants for temporary housing and home repairs, low-cost loans to cover uninsured property losses, and other programmes to help individuals and business owners recover from the effects of the disaster,” the White House statement said.