Philadelphia's largest city workers' union is going on strike for the first time in nearly 40 years on Tuesday after a deal couldn't be reached with the city. AFSCME District Council 33, which represents thousands of city workers, is walking off the job after negotiations didn't end in a deal. The union last went on a strike in 1986.

Representatives from AFSCME District Council 33 and Mayor Cherelle Parker's administration resumed talks Monday night to avert the first major city worker strike since 1986.

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.