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.

Learn More

For more information, please visit ready.gov, American Red Cross and floodsmart.gov.