Above you see a fire dept Landing Vehicle Tracked (LVT). Many fire depts in the deep south after WW2 took possession of these vehicles to use in flood/hurricane rescue.
Fast forward to today and every fire dept in the south could use a M-113 (that retains its amphibious capability) for the same work. Additionally out west a few could be outfitted to tow water trailers and used to fight fires in the deep wilderness.
Militarization of civilian rescue forces isn't a bad idea. Its time has come. Law Enforcement? That's a different kettle of fish.