EVANSDALE, Iowa (AP) — Officials say the water tower in the Waterloo suburb of Evansdale is functioning again after a suspected ice blockage melted. Officials also lifted the boil order after tests showed Thursday that the water was safe for consumption. Residents and businesses lost water service for a time Monday, regaining it at lower pressure when well water was redirected into the system, bypassing the tower.

Water plant and system manager Mike Ellison suspects that ice had blocked a standpipe. Mayor Doug Faas says the rising temperature let the tower cure itself. The National Weather Service says the temperature at the Waterloo airport got down to 20 below zero (minus 29 Celsius) Monday morning.