As we watch the percent of containment slowly rise on the #QuarryFire, we always get questions on why it seems to take so long. This is why. To consider an area contained- firefighters need to be sure that the fire in that area is truly not going to go anywhere. This is where mop up comes in- drowning out any embers or "heat". And to make sure there's no heat remaining- crews do what we call "cold-trailing." Taking an ungloved hand, and feeling the burn area to see if it's cold. On Division Zulu