TEXAS — The Texas Department of State Health Services is tracking deaths attributed to February’s devastating winter storm and resultant power outages.

While the exact number may never be known, the current death toll stands at 151.

The majority of the deaths are associated with hypothermia. The number could continue to rise as officials link more deaths to the storm that knocked out power to more than 4 million customers in Texas.

Many homes went without power or drinkable water for days after subfreezing temperatures, failing power plants and record demand for heat pushed Texas’ electric grid to the breaking point.

The disaster launched a congressional investigation and led to the ouster of the head of the state’s embattled electric grid, the Electric Reliability Council of Texas.

Harris County, which includes Houston and is the largest county in the state, was hit hardest. DSHS officials identified 41 storm-related deaths there. There have been 12 deaths identified in Travis County, 11 in Dallas County, and nine in Bexar County.

The Associated Press contributed to this report.