Chautauqua County leaders are facing limited options, as continued erosion of the cliffside could put the iconic Dunkirk Lighthouse at risk of collapse in the coming years."Over the last several years, the storms have been getting more fierce," Lighthouse Treasurer David Briska told WKBW. "The lake hasn't been freezing as much in the wintertime, and so when all the storms come through, and the waves start hitting the shoreline, we are getting mo…