Fifteen Kiwi firefighters are joining the battle against wildfires raging in northern and western parts of the US.
National Rural Fire Officer Kevin O'Connor said the team would leave on Sunday for the National Interagency Fire Centre in Boise, Idaho, where they would be briefed and deployed to Washington, Montana, California or Oregon.
A team of rural firefighters returned from a month-long stint in Canada last week.
Mr O'Connor said fires in Oregon and Washington have burnt more than 200,000 hectares in the past few days, while fires in California have destroyed nearly 50,000 hectares this year.
High temperatures, dry conditions and lightning strikes were hampering efforts by thousands of local firefighters and army volunteers.