LISBON, July 27 — The sixth-generation fires — the most extreme and uncontrollable category of forest fire — are likely to become increasingly common as climate change...

LISBON, July 27 — The sixth-generation fires — the most extreme and uncontrollable category of forest fire — are likely to become increasingly common as climate change...

Fires like those burning for a week in France and Spain are so intense they often make direct firefighting impossible, marking a new pattern driven by climate change that calls…