Police say fires that destroyed ballots in drop boxes in Oregon and Washington are connected

The transcript discusses fires set in Portland, OR, and Vancouver, WA. In Portland, a fire suppression system activated, limiting damage to three ballots. However, in Vancouver, the system failed, resulting in the destruction of hundreds of ballots.

What was destroyed as a result of the fire in Vancouver, WA?

Describe the events that led to the destruction of ballots in Vancouver, WA.