ATHENS, Greece—Fanned by strong winds, two new big wildfires erupted Monday in hard-hit Greece, triggering evacuation alerts for villages southeast and northwest of Athens—only days after blazes consumed large tracts of forest north of the Greek capital. Greece has been roiled by hundreds of wildfires this month. Other Mediterranean countries—Turkey, Italy, Algeria, and Spain among them—have suffered similar problems. The worst of the two blazes that erupted Monday was in the Vilia area northwest of the Greek capital, which triggered an evacuation alert for eight villages. Greece’s minister for public order, Michalis Chrysochoidis, said the flames were coursing through a densely forested area with scattered villages, none of which were in direct danger. “We are trying to stop the fire from spreading” towards the nearby large village of Vilia, he said. That blaze was being fought by 240 firefighters—including 143 from Poland—supported by eight water-dropping planes and nine helicopters. Another …