After the latest marathon with the city, which ended without a deal, Philadelphia's largest blue-collar union is moving toward going on strike at 12:01 a.m. Tuesday.AFSCME District Council 33 left Monday morning's negotiations with the Parker administration without a new contract in place.

If thousands of District Council 33 workers go on strike at midnight, here is what Philadelphia Mayor Cherelle Parker and city leaders plan to do as it will impact critical services in the city, from sanitation to 911 dispatch.

Philadelphia Mayor Cherelle Parker is expected to hold a news conference at 2 p.m. just two hours after the city’s largest blue-collar union walked out on negotiations with city officials instead of reaching a new contract on Monday.