Locals and visitors in Greece have been advised to protect themselves from the heat as meteorologists expect temperatures to keep rising this week with the heat wave pushing past the 40-Celsius mark on Wednesday and Thursday. On Monday temperatures in Greece's two largest cities, Athens and Thessaloniki, reached a 35-Celsius high, and on Tuesday pushed up to an oppressive 38C. Several municipalities around the country have opened the doors of air-conditioned spaces for the public.