AUSTIN, Texas—States slammed by winter storms that left millions without power for days have traded one crisis for another: Broken water pipes brought on by record-low temperatures have created a shortage of clean drinking water, shut down airports and left hospitals scrambling. Texas authorities ordered 7 million people—a quarter of the population of the nation’s second-largest state—to boil tap water before drinking it because low water pressure could have allowed bacteria to seep into the system. A man died at an Abilene health care facility when a lack of water pressure made medical treatment impossible. About 260,000 homes and businesses in Tennessee’s largest county, which includes Memphis, were told to boil water due to water main ruptures and problems at pumping stations. Memphis International Airport canceled all incoming and outgoing passenger flights Friday due to water pressure issues. And in Jackson, Mississippi, most of the city of about 161,000 was …