“Employees at a downtown restaurant called for the services of the Madison Fire Department Tuesday night when they realized there was a carbon monoxide leak in the basement.
All occupants had already evacuated when Engine Company 1 arrived to 419 State Street, Zandru’s Tapas Bar. MGE was also on scene inspecting the gas water heaters and gas boilers serving the business and the apartments above the restaurant…The restaurant manager was told they would not be allowed to re-open until a licensed gas appliance technician comes in to perform the appropriate repairs.”
https://cityofmadison.com/fire/daily-reports/downtown-restaurant-closed-tuesday-due-to-carbon-monoxide-leak