An interesting statistic is that at least 20% of undetermined house fires are believed to have been started by rodent activity. When you consider the number of structures in existence, 20% having rodent issues is a huge number. That said, when it comes to home or business fires, any number is too high.
Rodents squeeze into the smallest of holes and they love to chew on everything. This can wreak havoc, especially when it comes to electrical. With the above statistic, you can see why property inspectors often make notes on open electrical boxes and missing knockout covers.
These notes in the reports should help reduce the risk of fires and hopefully contribute to a safer building.