Grace Under Fire. Summary: When a certain green-eyed firefighter appears at the school where Castiel teaches, Balthazar decides to help them out before the flame fizzles... purely out of the goodness of his heart, of course. Nothing to do with said firefighter’s gorgeous brother at all.
http://the-diggler.livejournal.com/23977.html

Gonna Be A FIreman When the Flood Rolls Back. Summary: Firefighting is Dean's dream job and he's damn good at it – still, there's something about his most recent call he can't quite shake. Or to be more specific, a certain blue-eyed rescue he can't keep out of his dreams.
http://archiveofourown.org/works/587006

Set Me On Fire. Summary: Dean decided long ago that amateur heroes are stupid. They always need professionals to rescue them.

http://deancastiel.livejournal.com/2355510.html

Sweet Tyranny. Summary: I suck at summaries. This is based off the prompt I received from elemenoze . Prompt: “Give me a Dean/Cas AU. I want a firefighter Dean, teacher Cas…throw in some Gabriel, Jimmy, Anna, Sam/Jess and an adorable, vomit inducing child of theirs. Give me an unremarkable first meeting and awkward shenanigans the second time around. Shake well and serve.”
http://zeppx.livejournal.com/tag/fic%3A%20sweet%20tyranny