There’s been minimal if any impact among emergency services here. It’s been a very small albeit vocal minority kicking up a fuss; operations have carried on. Most of the gnashing of teeth from that small group has already faded. Some have quietly gotten vaccinated and gone back to work. A few have put in early retirements. A very scant few may make a fight of it, but that will basically just mean their pay stops and an LWOP entry gets paid in the system. Some have gone on sick leave to stave it off, that will only carry them for so long before other mechanisms kick in.
Most police, firefighters, and paramedics also like things like restaurants, concerts, sports events, and concerts anyway. Even well before any of these restrictions came into play, when we were offered vaccine clinics, uptake was enthusiastic and widespread.