" I don't know of any description of an emergency that is just used for car breakdowns on the road, which is what I'm inferring you are describing in this sentence. " You can use "full blown" with any emergency, not just cars. "
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Mr. TomWhat started with a strange smell quickly turned into an all-load/all-out/all road??? emergency."All out" could reference the pipe organ image, "pull out all the stops," or it could suggest that all available resources should be employed - like a three-alarm fire.