Helena Smith in Athens

The Greek island of Santorini has more hotel beds per square metre than any other Greek tourist destination apart from Kos and Rhodes. Photograph: VW Pics/VWPics/Universal Images Group/Getty Images…

Dimitris Petrou and his dog Mallou on the veranda of his burned-out home in Nea Penteli, Athens. Photograph: Helena Smith/The Guardian “I used to talk to them every day.” Dimitris Petrou takes in…

Trees, cooling centres, water stations. All three are on Haris Doukas’s mind as he sits in his office-turned-control centre on the top floor of city hall.