Londoners are bracing themselves for a turbulent 48 hours as the Met Office issues a severe weather alert for thunderstorms, effective from today, 24 July 2026. Heavy downpours, frequent lightning and strong winds threaten to disrupt life in the capital, with localised flooding and hazardous travel conditions likely.
But the drama won't be over when the storms clear - a four-day heatwave is forecast to bring soaring temperatures of up to 32C to London and parts of Southern England. The high-pressure system driving this hot air will dominate the region, promising prolonged sunshine and warm continental air.
A more mixed bag awaits other regions across the UK. Scotland and Northern Ireland can expect milder conditions, with a mix of sunshine and showers, while Wales is forecast to experience some warmer temperatures - albeit not as extreme as those expected in London. Scattered showers are likely during the initial 48 hours there.
Emergency services and local authorities are on high alert for both scenarios. During the thunderstorms, they're urging residents to secure loose outdoor items, avoid travel when possible, and watch out for lightning strikes. Once the heatwave sets in, public health advice will focus on staying hydrated, wearing light clothing and seeking shade.
Infrastructure is also at risk, with a heightened danger of rail disruption due to both flooding and heat-related track issues. Residents are advised to stay informed through official weather updates and check travel conditions before making journeys over the coming days.