UK heatwave live: Red extreme heat warning looms with 40C temperatures expected

UK to melt in hottest June day on record as temperatures soar to 39C

Met Office issued red heat warning for UK Wednesday-Thursday with 40°C forecast, potentially breaking July 2022's 40.3°C record. Extreme heat risks cascading infrastructure failures—power, telecom, water loss—demanding urgent data center cooling and business continuity contingencies for tech operations.