What stops a giant fire? Lessons from 1949 and Greece's 2023 megafire

A devastating wildfire, originating in Saumos, has scorched nearly 32,700 hectares in France's Gironde region and is now threatening the outskirts of Bordeaux. The blaze, which began on July 22, has prompted the evacuation of approximately 200,000 people across the Southwest, including 167,000 in Gironde alone. Authorities are grappling with the escalating situation, considering all scenarios, even a potential evacuation of Bordeaux.

Firefighters, supported by aerial resources, are battling the inferno, which has been fueled by a combination of high temperatures and shifting winds. While a slight decrease in temperatures and increased humidity have allowed for renewed efforts, the fire remains dangerous. Forecasters warn of another heatwave next week, which could further complicate firefighting operations and extend the fire's progression.

The question of what will ultimately stop such a colossal fire is pressing. Historical accounts from two major blazes – the Saucats-Cestas fire in Gironde in August 1949 and the Evros fire in Greece in 2023, which became the largest recorded in the European Union – provide valuable lessons. These past events offer insights into the factors that contribute to the containment of massive fire fronts, even before they are fully extinguished.

Understanding these historical precedents is crucial for managing current and future large-scale fires. The 1949 Gironde fire and the 2023 Greek fire serve as stark reminders of the destructive power of wildfires and the complex strategies required to bring them under control. The ongoing efforts in Gironde highlight the immense challenges faced by emergency services in combating such extreme events.