How far from a forest fire do you have to be for a daily temperature record to count?

cross-posted from: https://lemmy.world/post/1745747

There have been some impressive (and scary) temperature records set in the past couple weeks. That said, there are parts of Canada that are currently on fire that likely have a daily temperature in the hundreds of degrees. Clearly that doesn't count for any sort of temperature record. What I'm wondering is: where's the dividing line? How far away from a big fire do you have to be to record a valid daily temperature?