Greece was hit by its earliest heatwave on record this month, causing multiple deaths and closing schools and tourist attractions. Temperatures have now dipped just below the official heatwave threshold of 38C, but little respite is expected for the rest of the summer. There is no doubt that the Mediterranean country is on the frontlines of human-caused climate change in Europe. Last year, it was scalded by a record long heatwave lasting 16 days, contributing to the EU’s largest ever wildfire as an area twice the size of Athens went up in smoke between July and August. At least 28 people were …