So then on the flip side, what it the acceptable number of rigs for the FDNY to send out of the city? Sure, NYC has a much deeper pool of resources, but sending even one rig out leaves that area short of fire protection. If I lived in the North Bronx I'd probably disagree with some of the statements in this thread.
There's no question that the FDMV needs more manpower and better equipment, but why should another community bear the cost with no benefit? At least the Westchester jobs respond back and forth with each other.
FDMV staffs 4 engines, 2 trucks and a command car. Mount Vernon is 4 square miles. That's not a terrible ratio but that gets used up right off the bat at a structure fire. FDMV's on duty manning probably just meets NFPA 1710 (excluding high rise jobs, which yesterday would qualify as). Even if they had FDNY's staffing per rig, they're still looking at mutual aid in some shape or form for just about any job.
Mutual Aid is just that: MUTUAL. The FDNY is not about to start calling Westchester departments across the city line for their fires. The FDNY has always been seen as a last resort because of the process to call them along with the interoperability issues that exist. As far as I know, no FDNY units carry trunk radios for Westchester's trunking system nor do they have Westchester's fireground channels in their portables (Maybe a few battalions and the Field Comm Unit does). The UTAC system would have to be activated and all that does is add another layer of radios needed on scene. We have not held a joint FDNY/Westchester mutual aid drill since the new trunk system went live a few years back. Why? Because the FDNY stopped participating.
Westchester seems to get a job like yesterday's every couple of years. Roughly the same amount of mutual aid departments that operated yesterday, either on scene or backfilling, operated at a similar job in Yonkers ~5 years ago on Garret Place and that's with all of the YFD operating as well. One last thing worth noting is that most if not all department's involved yesterday recalled off-duty personnel to man reserve apparatus meaning that the interruption on operations for those jobs was minimal.