The mayor of Fort Smith is asking residents to keep a bag packed and their vehicles' gas tanks between three quarters and full.
Brad Brake says it's a good idea in case there's a reason to evacuate.
Fort Smith saw two brush fires near the town over the weekend.
One is said to have been started by a child playing with a lighter.
Brake says the hot weather and high winds can lead to the extreme fire behaviour.
"We just want people to keep an eye on things, and please cooperate. We want to ensure that everybody's safe, that's the main thing."
Information about forest fires is available at this website, maintained by the NWT government: www.nwtfire.com