The UK is under amber heat-health alerts as a prolonged heatwave continues, with forecasters saying it may be among the longest-lasting since 1976. Multiple outlets report that the country is entering its third heatwave of the year, raising concerns about health impacts as temperatures rise again. The BBC and Sky News say conditions are expected to reach around 35C, with heat persisting over several days. In Norfolk, a local heat-health warning is reported as temperatures are forecast to soar, while the London Evening Standard reports a risk of thunderstorms during the week-long spell of hot weather. Separate reporting referenced by outlets also notes that parts of the UK, including the East Anglian coast, are affected by a marine heatwave, according to the Met Office. The Independent highlights that health services may face significant pressures during the heat, reflecting expected strain on care systems. Officials urge the public to take precautions during hot weather, particularly vulnerable people, although specific measures and timing vary by region.