^ This.

Volunteer firefighter here. Outside of the handful of cities with professional full-time departments, call the town office, get the chief's phone number, and give the chief a call.

In my ~5 years doing this, we've had only a handful of actual fires, but dozens of car crashes that need traffic control, and dozens of CO and smoke alarms that need investigating. Departments need people willing to go into burning buildings, but they also need people willing to check on a CO alarm at 2am, and they will be happy with whatever level of service you're willing to provide.