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Hutt City fire manager Alan Thomson says the nine New Zealanders sent to the United States to fight bushfires have all been deployed in Butte County in northern California.
The firefighters arrived in the county's main town of Chico at the weekend, the Chico Enterprise-Record newspaper reported.
Another 31 Australians have gone to fire lines and command centres in Mendocino, Shasta and Trinity counties.
Thousands of people have been evacuated as fires have burned nearly 23,000ha, destroying dozens of homes, and killing at least one person.
Mr Thomson is serving as the New Zealand liaison officer at the fire incident command centre at the town's Silver Dollar Fairgrounds.
The wildfires were originally sparked by hundreds of lightning strikes on June 21.
Mr Thomson said they were all eager to help out and that hundreds of New Zealand firefighters had wanted to volunteer.
"It's a wonderful opportunity to help out and to provide our experience," he said.
The New Zealanders will be away from their homes for 37 days.
- NZPA
