Nearly a third of New York City's firefighters are off-duty and 20 percent of fire companies were out of service on Monday as a result of de Blasio's vaccine mandate, with 800 EMTs also refusing to take the shot along with 5,400 cops. 

As of Tuesday morning, 3,300 of the FDNY's 11,000 firefighters were not working, including 1,000 who have taken unpaid leave as a result of the mandate and 2,300 who are on sick leave. In total, 2,530 are unvaccinated but it's unclear how many among them have been given exemptions and are still allowed to work. 

Fire chiefs say the majority of those who are on sick leave are unvaccinated - a claim that was denied by the unions on Tuesday at a meeting where more than 40 firefighters showed up to protest the mandate and seek support. 

Sixty fire companies were out of service, according to the Uniformed Firefighters Association on Tuesday.  

It slices a considerable chunk out of those who are responding to calls, forcing those who are working to pull up the slack in understaffed fire companies now riding four per engine in some parts of Manhattan, instead of the usual six. 

Overnight, there were two major fires in the city - one in Brooklyn and one in the Bronx. Four people were taken to the hospital but no one was killed. Firefighters say it's only a matter of time before staffing becomes so bad that some calls will not be responded to in time.

There are still 5,400 unvaccinated NYPD cops and 794 unvaccinated EMTs - the staff equivalent to 400 ambulances. The majority of the unvaccinated cops are still on the streets because they have filed exemptions, with only 34 opting to take unpaid leave on Monday.