A Fire and Emergency New Zealand (Fenz) spokesperson said a Tapu Volunteer Fire Brigade truck responded to the incident near the settlement of Te Puru, about 10 kilometres north of Thames, about 10.25am on Wednesday.
The spokesperson said no one was inside the vehicle at the time of the incident on Thames Coast Rd (State Highway 25).
It was also confirmed SH25 was open with emergency responders and Powerco on site.
Maryana Garcia is a Hamilton-based multimedia reporter covering breaking news in Waikato. She previously wrote for the Rotorua Daily Post and Bay of Plenty Times.