The cold snap sweeping Texas reached the northern part where authorities said 4.7 million users lost power. : At least one person was dead and more than 4 million were without power in Texas after a rare deep freeze forced the state's electric grid operator to impose rotating blackouts because of higher power demand. The cause of the death of the person was suspected to be exposure to "extreme low temperatures", Houston Police Chief Art Acevedo said on Twitter. The PowerOutage.us website, which tracks power outages, said 4,113,701 Texas customers were experiencing outages at 2:05 a.m.