Sanitation workers in Philadelphia could go on strike as soon as Tuesday, stopping regular residential trash pickup in the city.

Striking city workers are joining picket lines outside Philadelphia City Hall, public libraries and other worksites as nearly 10,000 unionized employees walked off the job in search of better pay and benefits.

Philadelphia residents have been warned to brace for a largescale workers' strike designed to shut down key infrastructure, such as garbage removal, starting Tuesday. Roughly 9,000 staff belonging to the city workers' union―the American Federation of State,