Community Safety Minister Fergus Ewing prompted fury among local authority chiefs on Friday after he issued them with a letter laying down the law on long-term reforms to Scotland's fire service.
Ewing's action has resulted in umbrella body Cosla warning that the entire council-government deal on finance for next year may now be off.
The letter from Pat Watters declares: "It is ironic that you should draw attention to the need to consider the long-term planning of the fire service at a local level when your government decided that only a one-year settlement could be provided rather than a longer term spending review. We wanted long-term financial clarity while your government wanted only short-term considerations. For you now to be asking to be kept informed about our medium and long-term planning, given that we were refused the financial clarity we sought, is nothing short of outrageous."
A Scottish Government spokesperson said: "Ministers are happy to engage with our local government partners."