AUSTIN, Texas • Power was restored to more homes and businesses in Texas on Thursday after a deadly blast of winter this week overwhelmed the electrical grid and left millions shivering in the cold. But the crisis was far from over, with many people still in need of safe drinking water.

Fewer than a half-million homes remained without electricity, although utility officials said limited rolling blackouts could still occur.

The storms also left more than 320,000 homes and businesses without power in Louisiana, Mississippi and Alabama. About 70,000 power outages persisted after an ice storm in eastern Kentucky, while nearly 67,000 were without electricity in West Virginia.

Snow and ice moved into the Appalachians, northern Maryland and southern Pennsylvania, and later the Northeast. Back-to-back storms left 15 inches of snow in Little Rock, Ark., tying a 1918 record, the National Weather Service said.

The extreme weather was blamed for the deaths of over three dozen people, some while trying to keep warm. In the Houston area, one family died from carbon monoxide as their car idled in their garage. A woman and her three grandchildren were killed in a fire that authorities said might have been caused by a fireplace they were using.

In Texas on Thursday, just under 500,000 homes and businesses remained without power, down from about 3 million a day earlier. The state’s grid manager, the Electric Reliability Council of Texas, said the remaining outages are largely weather-related, rather than forced blackouts that began Monday to stabilize the power grid.

“We will keep working around the clock until every single customer has their power back on,” said ERCOT Senior Director of System Operations Dan Woodfin.

Woodfin warned that rotating outages could return if electricity demand rises as people get power and heating back, though they would not last as long as outages earlier this week.

Adding to the state’s misery, the weather jeopardized drinking water systems. Authorities ordered 7 million people — a quarter of the population of the nation’s second-largest state — to boil tap water before drinking it, following record low temperatures that damaged infrastructure and pipes.

Shoppers stand in a long line inside a Target in South Austin, Texas, on Wednesday. Power outages in Texas have dropped to below a half million, but the state is still facing major problems with drinking water systems.

the associated press