(Portland, OR) -- The U.S. Forest Service is warning about an increase in human caused wildfires this year. Since June 1st, there have been 197-human caused or undermined fire starts on National Forest lands in Oregon. With lightning storms and gusty winds in the forecast for some regions, they're asking people using National Forest lands to be extra cautious with things that might start a fire. Campfire bans are in effect outside of developed campgrounds in some areas, while fires are entirely prohibited in others.