By State › Idaho

Idaho: Overview

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Everything in the main manual and the skill guides applies in Idaho exactly as written. What’s different here is the specific hazard profile and the state, local, and legal context around it. This page is the starting point; the other three pages under Idaho go deeper on laws, local resources, and the data behind the risks named here.

The 1910 Big Burn: the fire that shaped a century of American fire policy

Over three days in August 1910, a wind-driven firestorm burned 3 million acres across northern Idaho and western Montana, killing 87 people, 78 of them firefighters. It remains one of the deadliest wildfires in U.S. history, and its aftermath reshaped how the country fights fire: the young U.S. Forest Service, created only five years earlier, used the disaster to justify an aggressive nationwide “put every fire out” policy that dominated American wildfire management for most of the 20th century, a policy later understood to have made forests denser and future fires worse. See the Risks page for the full data.

The 1976 Teton Dam failure: catastrophic on its first fill

On June 5, 1976, the newly built Teton Dam failed catastrophically during the very first filling of its reservoir, releasing more than one million cubic feet of water per second and draining the entire reservoir within six hours. The flood devastated the towns of Sugar City, Rexburg, and Wilford downstream, killing 11 people, destroying 733 homes and 250 businesses, and causing damage estimated at $400 million to $2 billion depending on how total losses are calculated. It remains one of the costliest dam failures in U.S. history. See the Risks page for the full data.

What this means for how you use the rest of this manual

The manual’s Tier structure and the skill guides apply without modification. What’s different in Idaho: wildfire risk here has a documented history of overwhelming even a well-organized firefighting response, so defensible space and evacuation planning matter as much as in California or Oregon, and the Teton Dam failure is a reminder that even brand-new infrastructure can fail catastrophically and without much warning, worth keeping in mind for any household downstream of a dam.

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