The Brief A prolonged subzero cold snap forced Dorshak Tree and Snow Services to pause tree work for the first time in 38 years. A prolonged stretch of subzero temperatures is forcing some outdoor businesses to slow or halt operations as extreme cold strains workers and equipment across southeastern Wisconsin. What we know:At Dorshak Tree and Snow Services, winter weather is routine. The company paused tree services for two weeks — the first shutdown of its kind in nearly four decades — citing safety concerns and mechanical failures caused by the cold. "People who work outside in winter are just a different breed," said Ericka Everett, Dorshak Tree and Snow Services operations manager.