The Met Office predicts temperatures could soar to 35C in the South East on Monday, surpassing the expected highs for islands such as Mykonos, Rhodes, and Santorini. Advertisement AdvertisementAdvertisement AdvertisementIn response, the UK Health Security Agency (UKHSA) has issued amber heat-health alerts for the East Midlands, East of England, South East, and London, effective from Monday until Wednesday morning. Yellow heat-health alerts will also be in place for the North West, Yorkshire and The Humber, West Midlands, and South West during the same period. He added: "And then even by Wednesday, we're looking at high 20s, 26 or 27C, in the South East. Wales is forecast to reach the high 20s on Monday before cooling to the mid-20s over the subsequent days.