Heavy rainfall since Wednesday is leading to an increased threat of landslides. According to the National Weather Service, rainfall amounts ranging from three-quarters of an inch to three inches have been observed across much of Western Washington since Friday. This amount of rain adds to already saturated soil from the past several weeks. Additional rain is expected tonight that will put extra pressure on soil instability and is leading to an increase threat of landslides. Areas most susceptible to landslides are steep coastal bluffs and steep hillsides.