The family of an 11-year-old boy who died in recent cold weather in Texas have filed a $100m (£71m) lawsuit against power companies for negligence.
Cristian Pineda was found unresponsive by his mother in their mobile home last week amid freezing temperatures.
Millions were left without power in the unusually cold weather, which has killed dozens in southern states.
The family suspect hypothermia but police say official autopsy results may take weeks.
The lawsuit accuses utility firms of putting "profits over the welfare of people" by failing to prepare properly.
Both the Entergy Corporation provider and the Electric Reliability Council of Texas (Ercot) are named in the lawsuit.