Crews were called to a report of smoke coming from a property shortly before 6am.
The two crews were then called to a commercial building in the town centre, where another lightning strike had ignited a fire.
There were no injuries and both fires have since been put out.
MetService meteorologist Dan Corrigan said the stormy front has since moved beyond the Grey District.
“We’ve had an active band of storms work its way northwards up the West Coast, it’s just coming around upper Buller so around Kahurangi National Park is where it is at the moment.”
He said Tasman, coastal Canterbury and Otago and Kāpiti Coast to Raglan may also see thunderstorms today.
Meanwhile, strong wind watches are in place for parts of the North Island.
A watch is in place for Taranaki from 10am until 5pm, as well as Taumarunui, Taupō, Taihape, Whanganui, inland Hastings District, Central Hawke’s Bay District, and Manawatū, north of Hunterville, from 11am until 11pm.
“Westerly winds may approach severe gales in exposed places,” MetService said.
- RNZ