ATHENS/ CARCES, France — Wildfires fanned by gale-force winds burned across multiple areas of Greece on Saturday, forcing residents to flee as conditions worsened again in parts of Spain and France. In one escalating Greek blaze, firefighters, police and ambulances slowly withdrew before a huge wall of fire and smoke engulfing forests and shrub near Porto Germeno on the Gulf of Corinth 60 km (40 miles) northwest of Athens. "The situation is extremely hard, especially today. We have really strong winds, gusts exceeding 73 kph (45 mph). The direction of the fire can't be determined easily," doctor and first responder Giorgos Doulas said. Europe has been ravaged by wildfires this summer after a period of successive record-breaking heatwaves and little rain, in conditions that scientists say have been exacerbated by climate change. Several have broken out in Greece in recent days after a period of relative calm there. Northwest of Athens, authorities told people from the towns of Agia Paraskevi, Kryo Pigadi and Agios Nektarios to evacuate. Helicopters dropped water and fire retardants to