Large fires near the Hanmer Springs turnoff on the Lewis Pass Rd have brought traffic to a standstill.
There are reports of six uncontrolled fires near the Lewis Pass Highway north of Hanmer Springs.
The highway has been closed as a result, 10km north of Hanmer.
Fire Shift Commander Andrew Norris said the fires aren't suspicious - they're believed to have started from sparks off a vehicle.
He says six appliances are on the way, and the fires will also be fought from the air.
Cmdr Norris said the steep terrain is making the fires travel faster and more difficult for fire crews to attack.
The fires have closed roads between Springs Junction and Hanmer Springs along State Highway 47.
No detours are in place and drivers are advised not to travel. Delays are expected.
Cordons are in place on SH7 at Rotheram Rd South and Flintoff- Mouse Point Rd and at the intersections of SH7 and SH7A (Hanmer turnoff)
and Leslie St and River Rd (Waiau).
The Fire Service is in the process of making more helicopters available.
Police are on their way to help with traffic control.
