WA volunteer firey charged with arson

A 23-year-old volunteer firefighter has been charged with arson after allegedly lighting three fires in Western Australia in December.

Police on Sunday said the man faced three counts of wilfully light fire likely to injure or damage over two fires lit in Donnybrook on December 22 and a third on December 28.

The last fire had a "significant financial impact" on the community and emergency services, they said.

The man will appear before Northbridge court via videolink on Sunday.