The UK is bracing for a potentially record-breaking third heatwave this weekend as forecasters warn of temperatures reaching 30C in some areas. The latest hot spell follows June's provisional data showing it was England's warmest on record and the second-warmest nationwide.
A large high-pressure system, currently building from the Azores towards Portugal and Spain, is set to extend across France and southern Britain by Saturday. This influx of warm air means some locations in England could meet heatwave criteria, with London and the south-east declared when daytime temperatures reach 28C for three consecutive days.
While most areas will initially stay below these thresholds, temperatures in Greater London and the Home Counties are expected to nudge 28C by Friday. Sunday is identified as the earliest day temperatures could hit 30C in some English locations, potentially marking a heatwave in those specific areas. Yellow health alerts have already been issued for several regions, warning vulnerable people of increased risks.
Next week promises more established warmth across southern Britain, with highs frequently reaching or exceeding 30C - although there will be variations. Initially, westerly winds might temper temperatures, but brief southerlies could push them higher. Conversely, northern regions are less likely to experience heatwave conditions due to the high-pressure system's position.
Northern cities like Belfast, Liverpool, and Glasgow are forecast 20-24C, while southern locations face more extreme temperatures. The Met Office advises staying hydrated, seeking shade during peak sun hours, and checking on vulnerable neighbours as temperatures soar.