London faces sixth heatwave of summer from 11 August
Temperatures will reach 30°C for three consecutive days, meeting the Met Office heatwave threshold
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Only one named source (Martin Padley) and specific forecast origins, lacking multiple independent outlets or documents.
How well corroborated and evidenced the reporting is. Higher is better.
Provides clear impact on water supply, includes quoted official, specific dates and temperatures, and stays factual.
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London is expected to enter its sixth heatwave of the summer on 11 August, as temperatures climb to 30°C for three consecutive days. The Met Office defines a heatwave in the capital as three days of 28°C or higher. BBC forecasters have confirmed the conditions will be met from Tuesday to Thursday next week.
The forecast follows a period of lower rainfall, which has reduced Thames Water’s storage levels by 15% this month. Martin Padley, Water Director at Thames Water, told MyLondon that while there is no immediate risk of water shortages, the situation is significant. He urged residents to treat water as a precious resource.
London heatwave confirmed: three days above 28°C from 11 August
Thames Water reports 15 percent drop in storage as temperatures stay high into next week
What the forecast shows
From 11 August, temperatures will rise to 28°C and remain at or above that level until 15 August. The highest temperatures, reaching 30°C, are expected on 12 and 13 August. The Met Office’s long-range forecast suggests the heat may be accompanied by thunderstorms, though it describes the conditions as less extreme than recent heatwaves.
WXCharts, a separate forecasting service, predicts particularly warm nights. It expects temperatures to stay around 31°C at midnight on 13 August, which could make sleeping conditions uncomfortable for residents without cooling measures.
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Water supply concerns
Thames Water has reported a 15% decline in water storage compared to last month. Padley attributed the drop to prolonged dry weather, which has limited the company’s ability to abstract water from natural sources. He emphasised that while supplies are secure, the current conditions require careful management.
It's been bone dry, we've not been able to abstract an awful lot of water. But there is still water for everybody to drink, nobody needs to worry but it is quite an important situation we're in at the moment.
Martin Padley, Water Director, Thames Water
The company has not announced any restrictions on water use but has repeated calls for customers to reduce unnecessary consumption. Thames Water serves approximately 15 million people across London and the Thames Valley.
What happens next
Temperatures are expected to remain above average until at least 17 August, though the Met Office forecasts a gradual cooling trend from 16 August. The possibility of thunderstorms could bring some relief, though rainfall amounts are predicted to vary across the region.
Thames Water has not indicated plans for hosepipe bans or other restrictions but will continue to monitor storage levels. Residents are advised to follow the company’s water-saving advice, particularly during peak demand periods.
Questions this report answers
+What is the Met Office definition of a heatwave in London?
The Met Office defines a heatwave in London as three consecutive days with temperatures of 28°C or higher. This threshold will be met from 11 to 13 August, marking the sixth heatwave of the summer.
+How much has Thames Water storage dropped this month?
Thames Water has reported a 15% reduction in water storage compared to last month. The company states supplies remain secure but urges residents to conserve water during the dry period.
+Will there be water restrictions during the heatwave?
Thames Water has not announced any water restrictions, such as hosepipe bans. The company assures customers that taps will not run dry but describes the current situation as significant.
+When will temperatures start to drop?
The Met Office forecasts temperatures will remain above average until 17 August, with a gradual cooling trend beginning on 16 August. Thunderstorms may bring some relief, though rainfall amounts are expected to vary.
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