A fourth heatwave is currently affecting parts of the UK, with temperatures expected to reach up to 35°C in the south-east and east of England by Wednesday.

The UK Health Security Agency (UKHSA) has issued amber heat health alerts for much of eastern England due to rising temperatures posing risks to vulnerable groups.

While central, southern, and eastern England will experience peak heat, Northern Ireland, Scotland, and northern England will remain cooler with cloudier conditions and rain.This week's heatwave is anticipated to be shorter-lived compared to previous summer events, though isolated showers may occur later in the week.The Met Office notes that July 2026 is currently the second hottest month on record, behind only July 2006.Drought conditions persist across central, southern, and eastern England, with rainfall levels at historic lows.This has led to hosepipe bans for millions of households and increased wildfire risks.

The lack of significant rain continues to raise concerns about soil moisture and water availability, particularly in areas like Surrey's Wisley, which has seen 40 days without precipitation.

The UKHSA warns that high temperatures will strain health and social care services, with prolonged above-average temperatures affecting both day and night conditions.