Here is a link to our FB page: you can see what we are using now....I am sure you can make it a million times better:
https://www.facebook.com/ilovefirefighting
Other things to consider for the logo are: Ax, Halligan Bar, firefighter irons, Fire helmet. (if you don't know Google it)
Also consider that not only is this logo going to be used online it will also be made into stickers, tee shirts, hats etc. So as you are designing it think...would someone want to wear or represent this in their daily lives...If the answer is no, then you won't be a winner.