Fire's can break out at any time! When entering a site you should familiarize yourself with where fire extinguishers are kept in order to get to one as quickly as possible if an emergency arises. If you've never used one before, here's a quick tutorial:

1. Pull the pin
2. Aim the nozzle
3. Squeeze the handle
4. Sweep from side to side at the base of the flames

Remember, you should only be fighting the fire yourself when it is at the incipient stage, which is around the size of a home depot orange bucket. Anything larger and the fire department should be called immediately.