As temperatures start to dip, Portland Fire & Rescue is growing more concerned about camp fires that the homeless use to keep warm. It was last winter that PF&R first noticed a huge spike in these fires. There have been more than 2,000 fires related to homeless camps over the past year. A couple of the fires killed people who were in tents at the time, and others spread uncontrollably. More than 240 of the fires caused some damage to structures or terrain. "For us, it's about if you are making sure if you are using fire to warm, it's in a safe manner," said PF&R spokesperson Terry Foster. "For us, it's important that you don't, obviously, burn inside of anything - tent, RV, encampment."