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Story summary
- A marine heatwave in UK waters may push sea temperatures up to 5 °C above normal.
- The UK faces its third heatwave, with forecasts near 34 °C in London and the southeast.
- Yellow heat-health alerts cover the Midlands and southern England until 20:00 GMT on 11 July, warning higher risk for vulnerable people.
- The Met Office says inland temperatures may reach the low-30s Celsius, with a repeat of late-June extreme heat considered unlikely.
