PORTLAND, Ore. — The Oregon Department of Forestry has taken a rare fire-prevention measure on land it protects in the southwest part of the state.

All industrial actions are prohibited under an order that took effect Friday. Waivers may be considered on a case-by-case basis for extremely low risk operations, but no waivers will be issued for harvest or road construction work.

It’s the first time in more than 20 years that the agency’s Southwest Oregon District has issued such a closure. The step was taken as a heatwave makes life even more difficult for a region that’s being battered by wildfires.

There’s no timetable for how long the closure will remain in place.

Some of the industrial actions that are prohibited include: cable yarding, use of power saws, logging operations using tractors, skidders, feller-bunchers, mechanized loading or hauling, blasting, welding or cutting of metal.