The crews are expected to be sent to Montana, the worst affected state where 13,000 firefighters, marines and national guardsmen are fighting huge fires in tinder-dry conditions.

• 这批专家将被派往火势最严重的蒙特纳州，在那里，13,000名消防队员、水兵和预备役队员在极其干燥的环境下与大火搏斗。