Floods are a common hazard in coastal Oregon. Flood effects can be local, impacting a neighborhood or community, or very large, affecting entire river basins.
Our floods locally usually develop slowly, sometimes over a period of days. Overland flooding occurs outside a defined river or stream and can be destructive.
Be aware of flood hazards no matter where you live, but especially if you live in a low-lying area. Even very small streams, gullies, creeks, culverts, dry streambeds or low-lying ground that appears harmless in dry weather can flood.
Know the Terms
Familiarize yourself with these terms to help identify a flood hazard:
- Flood Watch. Flooding is possible. Tune in to NOAA Weather Radio, commercial radio or television for information.
- Flash Flood Watch. Flash flooding is possible. Be prepared to move to higher ground; listen to NOAA Weather Radio, commercial radio or television for information.
- Flood Warning. Flooding is occurring or will occur soon; if advised to evacuate, do so immediately.
- Flash Flood Warning. A flash flood is occurring; seek higher ground on foot immediately.