EXPLAINERParis and other European cities are experiencing temperatures above 40C (104F), reaching levels normally seen across the Middle East.A blistering heatwave has gripped much of Europe, prompting the highest-level red alerts in parts of the United Kingdom, France, Spain and Italy.Authorities have warned of health risks, wildfires and travel disruptions as extreme temperatures persist.Recommended Stories list of 3 itemsend of listWith temperatures approaching record highs, officials have taken emergency measures, including a localised alcohol ban in parts of France under red alert, nationwide heat warnings in Germany and the cancellation of a World Cup fan zone screening in Madrid, where temperatures hit 39C (102F).Why is it so hot in Europe?A persistent area of high pressure, known as a heat dome, has trapped hot air over Western Europe, bringing clear skies, weak winds and prolonged sunshine. Hot air moving north from North Africa has added to the extreme temperatures. (Al Jazeera)Unusually warm seas around the UK, Ireland, France and the western Mediterranean have also helped keep coastal areas hot, especially at night. Coastal waters around Spain have reached record warm levels, according to Spain’s port authority.In the worst-affected areas – western France, England and Wales – daily average temperatures have soared more than 12C above the 1991-2020 baseline, according to Copernicus data. (Al Jazeera)Scientists say the early-season heatwave is part of a broader warming trend. Europe is the world’s fastest-warming continent, with temperatures rising by approximately 0.56C per decade since the mid-1990s, more than double the global average.Climate change is making heatwaves more frequent, more intense and likely to occur earlier and later in the year. Advertisement How hot are European cities today?To contextualise the temperatures Europe is dealing with, Al Jazeera looked at the maximum temperatures in five European capitals on June 24 and compared them with cities across the Middle East, North Africa and Asia, where high temperatures are more typically experienced.Europe is particularly vulnerable – mu …