Temperatures are set to soar to sweltering highs this week after the Met Office issued an unprecedented heat warning. Parts of the UK could reach 33C (91.4F) between Tuesday and Thursday, which is hotter than top European holiday destinations such as Marbella, Mykonos, and Tenerife. The mercury will remain above 31C (87.8F) during the week, with forecasters suggesting the next few days could be the hottest of the year. It comes after the Met Office issued its first ever “amber extreme heat warning.” Another warm start to Tuesday morning with strong #sunshine burning off any early mist ☀️ 🌫️ Cloudier in the far north and east ☁️ Temperatures rising quickly with an Extreme Heat Warning issued 🌡️ Latest info 👉 https://t.co/QwDLMfRBfs Stay #WeatherAware ⚠️ pic.twitter.com/JZB8RScvrD — Met Office (@metoffice) July 19, 2021 The warning—which is similar to those issued when heavy rain or snow is forecast—covers a large part of …