“Make sure you have good walking shoes,” Johnson said.
There’s one bright spot. Because Clark County is so far up the Columbia River, a tsunami would cause the river to rise only about 2 inches in Vancouver, he said. Also, the Bonneville and Lewis River dams are designed to withstand major earthquakes.
Surviving the quake and beyond
When the ground begins to shake, get under a table and hang on to the legs to remain covered. Don’t run for a building exit. Avoid glass display cases, face away from windows and protect your head from falling objects. After the ground stops moving, don’t smoke or light a flame due to chemicals and gases that may be airborne. Be prepared for aftershocks.
And don’t call 911.
“We know the earthquake happened,” Johnson said.
In advance, designate a friend or relative (out of state, far away) whom family members can call to relay personal status reports. Remember that text messages use less bandwidth than phone calls. Also in advance, copy your most important documents onto two USB drives. Keep one for yourself and mail the other to your family contact.
In the aftermath of a Cascadia quake, Clark County would be divided into “micro-islands,” areas blocked off from other places by broken bridges and fallen trees. People within those areas should offer each other assistance and share resources to build up the resilience of their micro-islands, Johnson said. That’s why it’s important to map your neighborhood in advance and find out who has tools, medical skills, an abundance of frozen meat, and so on.