Flooding in Whatcom County has previously led to evacuations, infrastructure damage, and property loss. Areas such as Sumas, Nooksack, Everson, Marietta, and Ferndale are particularly vulnerable. Landslides and mudslides have also been reported in areas like Kendall and Silver Lake Road. Residents in low-lying or flood-prone areas face the highest risks, including potential property damage and safety hazards. The region's history of 100-year flood events underscores the need for vigilance and preparation.