The Met Office has issued a 'red alert' for hay fever across the UK as pollen levels reach 'very high,' impacting around 13 million Britons. With spring temperatures expected to soar to 24°C, the peak tree pollen season is triggering allergy symptoms such as runny noses, watery eyes, and migraines. Pollen maps indicate that today, 'very high' levels are present throughout England and Wales, as well as parts of Scotland. The southeast and East Anglia are likely to experience these levels into the weekend. Met Office meteorologist Honor Criswick noted that dry, settled weather with plenty of sunshine is anticipated. Allergy UK advises those affected to remain indoors, keep windows closed, and shower after being outside. For those who must go outdoors, using antihistamines, wearing wraparound sunglasses, and applying allergen balm around the nose are recommended strategies.