Our region has experienced increasingly severe rainfall events in recent years. Heavy rain can create hazards such as flooding, heavy debris flows, and infrastructure damage. This page provides information on potential impacts, the District’s response, and what residents can do to stay prepared.
In addition, seasonal storms often bring heavy rain and high winds to the North Shore. Severe winds can blow down trees and branches, causing power outages, road closures, and traffic disruptions.
Learn more about the District's drainage system
Hazards during heavy rainfall
- Flooding and stormwater flow: High volumes of rainfall can overwhelm drainage systems and lead to localized flooding.
- Debris flow and accumulation: In some watersheds, rainfall can mobilize sediment, rocks, and boulders. This can happen quickly, causing materials to build up in streams and culverts and impact the ability for the storm systems to effectively convey storm water.
- Property impacts: While the District addresses public infrastructure, some private properties may still experience damage during extreme rainfall events.