An Amber heat-health alert has been declared for Slough by the UK Health Security Agency, running from 9am on Wednesday 8 July until 9pm on Sunday 12 July 2026. The escalation from a pre-existing Yellow alert covers the South East alongside five other English regions, warning that sustained high temperatures pose a genuine health risk. The alert applies automatically to all households in the town.
Dr Agostinho Sousa, Head of Extreme Events and Health Protection at UKHSA, urged residents to take care. “Sustained periods of warm weather can result in serious negative health outcomes across the population, so it is important that everyone takes sensible precautions while enjoying the sun,” he said. “Based on the current forecast, we don’t currently expect the health impacts to be as high as the heatwave we saw at the end of June but older adults and those with pre-existing conditions are still at risk.” Under the agency’s joint alert system with the Met Office, an Amber warning signals likely increased use of health care services by vulnerable groups and elevated risk for people over 65 or anyone with respiratory or cardiovascular conditions.
The alert marks the third heatwave of 2026, following Amber warnings in May and a rare Red extreme heat alert in late June when England recorded its warmest June on record. Slough Borough Council has published advice on its website, directing residents to NHS guidance on spotting heat-related symptoms such as headaches, nausea, intense thirst, confusion, and hot red dry skin. Anyone worried about their own health or that of someone else is told to consult NHS 111 online or call 111.
Looking further back, the alert system has been used only sparingly at the highest level — the Red alert in late June was only the second ever issued, after the first in July 2022. For the next few days, Met Office forecasts expect temperatures in southern England to climb above 30°C, with some spots potentially reaching 32–33°C by Friday. Residents are advised to stay hydrated, keep homes cool, check on vulnerable neighbours, and avoid the sun during the hottest hours.
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