A yellow heat health alert will be in effect across much of the UK starting Monday, as a heatwave is predicted to bring temperatures up to 31°C. This alert marks the end of a prolonged period

of wet weather, with the heat expected to last until Thursday afternoon.

The UK Health Security Agency (UKHSA) and the Met Office have issued warnings, particularly for the southeast, East Midlands, East of England, and East Anglia. The heat could put significant pressure on local healthcare services, especially affecting vulnerable individuals, such as those over 65.

The UKHSA has highlighted an "increase in risk of mortality amongst vulnerable individuals" and warned about the potential for indoor environments to become very warm.

Heatwave Expected in Southeast England

According to Liam Esslick, a meteorologist at the Met Office, while the highest temperatures are not guaranteed, London, Essex, and Kent are likely to experience the hottest weather. Most areas in the UK will see temperatures rise to the mid-20°Cs by midweek. Thursday is expected to be the hottest day, with "hot and humid" conditions in the southeast, some cloud cover, sunny spells, and potential showers from Wednesday onwards.

Esslick advises: "UV levels will be high, and the sun will be very intense. Wear sun protection, stay hydrated, and seek shade during the midday sun. Those sensitive to the sun should take extra precautions."

High Pollen and UV Levels

Very high pollen alerts are in effect for the beginning of the week, along with high UV levels. The Met Office has warned that the pollen count will be very high in England, extending to Wales and Northern Ireland, with the exception of the northernmost parts of Scotland.

Asthma + Lung UK has urged people with respiratory conditions to take precautions during the heatwave.

Record-Breaking Temperatures and Rainfall

May saw an average temperature of 13.1°C, surpassing the previous 2008 record of 12.1°C, influenced largely by higher overnight temperatures. Despite the higher temperatures, there was 32% more rainfall than average in England and Wales, making it the fifth wettest on record for England and the eighth for Wales.

Dan Rudman, Met Office deputy chief meteorologist, noted, “Whether or not everyone experiences heatwave thresholds, the majority of the UK will experience the highest temperatures so far this year. Confidence in the forecast reduces markedly from Wednesday onwards, with uncertainty in both how long the heat will last and how it will break down. However, by next weekend, cooler and more changeable conditions are more likely.” Photo by Funk Dooby, Wikimedia commons.