The climate crisis is driving an exponential rise in the most extremewildfires in key regions around the world.

Extreme fires are a small fraction of total wildfires, but they releasemore greenhouse gases because they burn whole trees. The gasesaccelerate global heating.

Whether the effect of this feedback loop is truly exponential remainsto be observed, but if it is, reducing greenhouse emissions may becomeimpossible. We should not wait for those observations before we actvigorously to reduce greenhouse emissions while we still can do so.