Menlo Park, California, is currently witnessing a notable increase in the population of Western Tussock Moth caterpillars, particularly around the Menlo-Atherton High School and neighboring residential areas. These caterpillars primarily feed on the leaves of willow and oak trees and are thriving due to the unusually warm spring temperatures experienced in the region. While the caterpillars themselves are not dangerous, direct contact with them can cause skin irritation in some individuals. Residents have reported large numbers of these caterpillars falling from trees and accumulating on properties, leading to concerns about potential health issues for those sensitive to their touch.