But without replenishing water and foam concentrate supplies (along with anything other media and equipment that might have been used), the immediate response capability would be so severely limited as to make the presence of the vehicles almost irrelevant. If hoses had been run out to hydrants for the first event, repacking them will take time and tenders without water/extinguishing media and without hoses to draw additional water are of even less value.
Looks like 1, possibly 2 firetrucks deployed any hoses, the rest, along with their crew are standing around twiddling their thumbs. Meanwhile an entire airport is shut down. Totally unacceptable.