Crews are working to put out a large fire at Bass Bay Brewhouse, a popular lakeside restaurant in Muskego, Wis., according to multiple reports. Firefighters responded on Friday morning after flames broke out at the business just north of Bass Bay. The restaurant and the residential parts of the building have been fully evacuated. Authorities urged the public to avoid the area around Ladwig Drive and Aud Marry Avenue while crews continued to battle the fire. Residents were also asked to stay away from the stretch between Lannon Drive and Moorland Road until further notice. Cause still unknown It remains unclear what caused the fire, according to reports. Fire officials are currently assessing the damage and investigating the origin of the incident. Community Landmark Impact The Bass Bay Brewhouse is well known in the Muskego community for its waterfront location, lively atmosphere and popular events. News of the fire raised concerns among residents and regular visitors, several outlets reported. Fire crews are expected to remain on site as they work to bring the fire under control and begin a full damage assessment.