An unusually early heatwave in Spain, which has been sizzling residents since the weekend, spread to the centre and north-east of the country on Wednesday. For the capital Madrid, the national weather service AEMET warned of 39 to 40 degrees Celsius, in Zaragoza it could even reach 45 degrees on Saturday. The forecast for the popular holiday island of Mallorca was 36 degrees. At the same time, temperatures in the south, which had been particularly affected so far, dropped only slightly: In Seville, 39 degrees was expected, in Córdoba 41 degrees. In the past few days, temperatures in Andalusia …