Other Business, Restaurant Wauwatosa, WI – Small businesses spared damage after water heater catches fire January 20, 2016 viking210 An automatic fire sprinkler system Monday spared three businesses in Wauwatosa from a potentially devastating blaze that would have closed the businesses for a significant length of time, according to the city’s fire department. Shortly before 9 a.m., a gas-fed water heater near a ceiling started on fire at Jersey Mike’s Subs, 2571 N. Mayfair Road, according to a news release from the Wauwatosa Fire Department. According to the release, an employee who noticed the fire warned workers in a neighboring business to evacuate but the fire was controlled by the sprinkler system before firefighters arrived. Water damage occurred in the three businesses. However, there was little fire damage and the neighboring businesses were expected to reopen within hours, according to the release.