All commercial and recreational fishing is prohibited in and near Long Island Sound from Norwalk to Milford this morning due to a massive Bridgeport fire , according to Coast Guard Capt. Ed Cubanski. Coast Guard and state Department of Energy and Environmental Protection (DEEP) are testing water samples from the Pequonnock River and Bridgeport Harbor to determine if water run-off from firefighting efforts carried any hazards into the waterway. Officials from DEEP and the Coast Guard remain on scene this morning of what officials now say is a five-alarm fire that burned overnight in Bridgeport. Foamy red substance in the water A foamy substance with a red tint was observed in the water, so the Coast Guard will fly a helicopter this morning over the harbor and along the shoreline to determine its spread. Yesterday, the DEEP yesterday stationed monitors testing air quality and detected no risk to public health. The smoke could cause respiratory irritation to people with preexisting respiratory conditions. The cause of the fire remains undetermined. The buildings on Seaview Avenue in the city\u2019s East End sustained multiple collapse areas so fire investigators have not yet entered the fire area. The factories destroyed houses a perfume company and roofing company.