Thames Water confirms that water supply problems are affecting 17 areas in the UK amid a heatwave. Both reports say the incidents include two separate problems impacting London, with multiple localities reporting issues with water availability on the first night of what is described as Britain’s third heatwave of the year. The Mirror reports that two incidents are affecting the capital, while the Daily Express focuses on the confirmed loss of water supply across the 17 areas and provides a full list of affected locations. Although the outlets differ in emphasis, they agree on the core points: Thames Water acknowledges an outage linked to the current heatwave conditions, the impact covers 17 areas, and the problems begin during the first night of the heat event. The reports indicate widespread local disruption across parts of London rather than a single isolated area. Details on when supply is expected to return are not specified in the provided excerpts.