ATHENS—Flames swept through a residential town outside Athens overnight as wildfires burned across Greece for a fifth day on Saturday, and hundreds of people were evacuated by ferry from the island of Evia east of the capital. The fire on Mount Parnitha on the outskirts of Athens has forced the evacuation of thousands of people since late Thursday, with emergency crews facing winds and high temperatures as they battle to contain its spread. Wildfires have erupted in many parts of the country amid Greece’s worst heatwave in more than 30 years, tearing through tens of thousands of acres of forestland, destroying homes and businesses, and killing animals. Temperatures have been over 40 Celsius (104 Fahrenheit) all week. Prime Minister Kyriakos Mitsotakis, speaking after visiting the main fire control center in Athens on Saturday, called it a “nightmarish summer”, adding the government’s priority “has been, first and foremost, to protect human …