read 323, subchapter 2 "powers & duties related to emergency management"
Apparently I read it with more understanding than you, Doug.
See where it mentions the duties &/or powers of:
governor, adjutant general, local government, heads of emergency management, law enforcement officers, state traffic patrol officers, conservation wardens, and even volunteers. (323.12 - 323.18, inclusive)
I'd say that covers the sheriff & police chief from several angles, though you might have to stretch "local government" a bit to cover the dog catcher.
A person who is granted emergency powers under this subchapter may not use those powers to restrict the lawful possession, transfer, sale, transport, storage, display, or use of firearms or ammunition during an emergency. 323.24