The European Union promised help for Greece where fire crews fought to keep flames away from the birthplace of the ancient Olympic Games as the country sweltered under a record heatwave.Temperatures in Greece reached 45 degrees Celsius (113 Fahrenheit) on Wednesday, in what authorities described as the worst heatwave since 1987.Neighbouring countries face similar conditions, fuelling deadly wildfires in Turkey and blazes in Italy and across the Mediterranean region.In Greece, firefighters have…