Weather in central London
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BBC forecasters say London will not see a heatwave in September, with Met Office temperatures forecast between 24 °C and 19 °C. Thames Water’s hosepipe ban, issued on 23 July, remains active for Barnet, and the Environment Agency warns the drought will persist until nationwide rainfall resumes.
London’s first official Thames bathing site at Ham and Kingston has been closed due to toxic blue-green algae, just three months after its designation. Richmond Council and the Environment Agency have advised against swimming or allowing pets into the water, while campaigners link the bloom to sewage discharges and Thames Water’s planned drought scheme.
Barnet residents are under an amber heat health alert until 29 August as England faces its driest July since 1836. The Environment Agency has declared drought across more than two-thirds of the country, with rivers and reservoirs declining and hosepipe bans in place for 27 million customers.
Two photographs taken at Gloucester Gate show green grass on 7 June and brown, dusty ground on 2 August. A hosepipe ban is now in force across most of London, prohibiting outdoor watering of plants and grass.
An Amber health alert is in force across London after Kew Gardens recorded its first rain-free July in 155 years. Barnet Council and Thames Water have imposed water-saving measures as temperatures exceed 30°C, increasing risks for vulnerable residents.
Barnet residents face growing fly-tipping problems as London records 481,088 incidents in 2024/25, an 8% rise. Experts cite high disposal costs, inadequate housing, and organised crime as key factors, while ministers allocate £45m to tackle waste crime.

Lewisham and Greenwich NHS Trust has drilled test boreholes in Ladywell Fields for a £25m heat pump project, discharging chalk sediment into the River Ravensbourne. The Environment Agency permit allows water release, but unpermitted water extraction for flushing has raised concerns among river protectors.
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