Barnet faces September heatwaves and extended hosepipe ban
Thames Water confirms 15% drop in storage as UKHSA issues amber heat alert until 5 August
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Barnet is set to endure prolonged heat and water restrictions after the Met Office warned of potential September heatwaves. The forecast, described by the Met Office as likely to remain above average, follows a 15% drop in water storage reported by Thames Water last month. The company’s temporary hosepipe ban, introduced on 23 July, remains in force across the borough.
Martin Padley, Thames Water’s Water Director, told MyLondon that while taps would not run dry, every drop counted during the drought. He said abstraction levels had been low due to the dry conditions. Affinity Water and Essex and Suffolk Water have also imposed hosepipe bans, affecting parts of West and East London respectively.
Barnet faces sixth heatwave of 2026 as Thames Water storage drops 15%
Temperatures in the borough will reach 30°C for three consecutive days from 11 August, meeting the Met Office heatwave threshold.
Heat health alert extended until 5 August
The UK Health Security Agency has maintained an amber heat health alert for London, the South East, East of England and East Midlands until 9 a.m. on 5 August. The alert, issued to NHS and social care providers, warns of increased risks to health and social care systems due to sustained high temperatures.
Barnet residents can expect a brief respite from the heat today, with temperatures peaking at 26°C before cooling overnight to 14°C. The Met Office forecasts dry, sunny conditions for the rest of the week, though temperatures will dip slightly on Thursday before rising again over the weekend. A small chance of showers exists on Sunday, but most areas will remain dry.
Amber heat alert extended across Barnet until Wednesday morning
Forecast temperatures of 28 °C on Tuesday could mark London’s fifth heatwave of the summer
What happens next
Thames Water has not announced an end date for its hosepipe ban. Residents are advised to check the company’s website for updates on restrictions. The Met Office’s monthly forecast suggests above-average temperatures will persist into September, with further heatwaves possible. UKHSA has not indicated whether another heat alert will follow the current one.
Questions this report answers
+How long will the hosepipe ban last in Barnet?
Thames Water has not set an end date for its hosepipe ban, introduced on 23 July 2026. The company has stated the restrictions will remain in place indefinitely until water storage levels improve. Residents should check Thames Water’s website for updates.
+What does the amber heat health alert mean for Barnet?
The UK Health Security Agency’s amber heat health alert, active until 9 a.m. on 5 August 2026, signals increased risks to health and social care systems. It advises NHS and care providers to prepare for higher demand, particularly among vulnerable groups such as the elderly and those with chronic conditions.
+Will temperatures stay high in Barnet through September?
The Met Office forecasts above-average temperatures for London in September, with possible heatwaves. While its day-to-day forecast does not extend that far, its monthly outlook indicates sustained warm conditions, particularly in the south of England.
+What are the weather conditions in Barnet this week?
Barnet will see dry, sunny weather today with a high of 26°C, cooling to 14°C overnight. Thursday will be slightly cooler at 23°C, before temperatures rise again over the weekend. A small chance of showers exists on Sunday, but most areas will remain dry.
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Barnet faces sixth heatwave of 2026 as Thames Water storage drops 15%