The Met Office has warned of a severe marine heatwave sweeping across UK waters, with sea-surface temperatures spiking up to four or five degrees above average in the English Channel and the North Sea. Experts fear the unprecedented warmth, fuelled by heatwaves in May and June, could escalate to a rare and "extreme" Category 4 event this week, threatening marine wildlife and damaging coastal habitats. #MarineLife #MetOffice #Heatwave #ClimateChange #C4News