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Rare PyroCb Phenomenon Exacerbates Wildfire in Southwest France

A wildfire in southwest France has escalated into a rare pyrocumulonimbus event, generating lightning and new blazes, officials report.

Editorial Desk

July 28, 2026 One Min Read

POLICY WIRE — PARIS, FRANCE — A wildfire in southwest France has intensified to such an extent that its smoke column has transformed into a thunderstorm, producing lightning that has ignited new fires beyond the original blaze, according to French officials.

This phenomenon, known as a pyrocumulonimbus (pyroCb), is a rare occurrence in Europe. The pyroCb not only generates lightning but also produces violent, erratic winds that can drive flames in unpredictable directions.

“The inferno is no longer simply being propelled by the weather. It’s making its own,” an official stated.

The development of a pyroCb indicates an extreme level of fire intensity, where the heat and moisture from the wildfire create their own weather system. This can lead to rapid fire spread — and make firefighting efforts significantly more challenging.

Authorities are urging residents in affected areas to remain vigilant and follow evacuation orders as the situation continues to evolve.

Reporting by Policy-Wire (PW)

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