ObscureB
Maybe ask these guys:

J-Rod
good luck, our homecoming was this week also and our theme was sunshine and i am not sure if we will win or not but we brought diffrent items can you do that? like see if your local fire department may have anything nothing dangerous of course but i mean you may even get some good idea's from them just a shot... l8tr and i hope this helps god bless -- J-rod

Kiara
Okay, these are probably way cheezy, but I thought I'd give it a try! C'mon Baby, Light My Fire! Holy Smoke! Hot Stuff! Burn Baby Burn!

thewallaceman
fire fighters find them hot and leave them wet

TheHangedFrog
Firefighters - God's gift to flame Firefighters- the few, the insane All people are created equal, some become firefighters If you are Rural area.. Goat Roping, Chew Chawing, All-Star Wrestling Watching, Jolly Vollies --- And Loving it. Firefighters -- We still make house calls. Firefighters -- Dancing with the Devil Firefighter - International Association of Fire Breathers (or eaters). Member of the International Brotherhood of Dragon Slayers (look up Firefighter TShirt online, might see some good sayings there.) Good Luck Thehangedfrog

mickiinpodunk
How about "We run in where others run out"; "Dancing where the Devil walks"; "Firefighters: Don't Meet'em by Accident".