After enduring multiple days of freezing temperatures and Texans dripping faucets to prevent frozen pipes from bursting, cities across the state warned residents that water levels are dangerously low and may be unsafe to drink. They’re telling Texans to boil tap water for drinking, cooking, brushing their teeth, and making ice — as residents have been struggling to maintain power and heat while an unprecedented winter storm whips across the state. While activities such as showering and doing laundry are safe, cities underwater boil notices are asking people to conserve water if at all possible. Approximately 590 public water systems...