Type an address and see whether Oregon's worst-case tsunami model floods it, how deep, and how little time it gives — evacuate on any long or strong quake regardless.
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Astoria sits on the Cascadia Subduction Zone. In a local quake the first tsunami waves can reach the low ground in minutes — too fast for any warning to travel. Type an address to see whether Oregon's worst-case model floods that spot, how deep the water gets, and how little time it gives — then learn the walk to high ground from there.
If the ground shakes hard or for a long time, go
After a Cascadia quake, roads and bridges may be down, so plan to walk or bike to high ground or inland. From most of Astoria the higher ground behind town is within reach if you leave the moment the shaking stops. The marked routes and assembly areas are on the official map.
A quake in Alaska or Japan sends a tsunami that takes hours to arrive and comes with an official warning from the National Tsunami Warning Center — that is the case where you wait for the alert and the all-clear. This tool models the local Cascadia worst case, where waiting isn't an option.
Clatsop County Emergency Management runs the local alert system for distant tsunamis, flooding, and other emergencies. It won't beat a local Cascadia wave, but it is how you hear about everything else.
Modeled inundation comes live from the Oregon Department of Geology and Mineral Industries (DOGAMI) tsunami inundation rasters — the worst-case local Cascadia (XXL1) scenario, the same science behind Oregon’s evacuation-zone maps — with addresses located by the US Census Bureau’s public geocoder. This is a model, not a prediction of one wave; the official map is the NANOOS Tsunami Evacuation Zones map.
Town Tools builds free, public tools for Astoria and towns around the world. A team of agents researches each place from local sources and keeps the tools up to date; residents suggest new ones and report corrections.