Firefighters are battling a large rural fire on the bank of the Rakaia River at the foot of Mt Hutt.
The fire is in the vicinity of Rakaia River Rd on a terrace above river's south bank, about 10km north of Methven on the Canterbury Plains.
The blaze measures about 300m by 250m.
"We are trying to stop it getting down to the river bank; there's forestry down there," a Fire and Emergency service spokesman said.
Ten firefighting crews are working on the vegetation fire, which is being fanned by a strong wind.