French firefighters are working around the clock to contain major wildfires in the Gironde region as a new heatwave pushes temperatures close to 40°C (104°F). More than 2,000 firefighters from France and neighboring countries are deployed, with more than 100 injured and four killed. Crews are battling flare-ups in burned areas while local volunteers provide support. Exhaustion is taking a toll on teams after days of intense work. Scientists say climate change is making wildfires like these more frequent.