The national forecaster predicts temperatures will climb through the weekend before rising more significantly through the middle of next week. A “fairly widespread heatwave” is likely across large parts of England and Wales, according to deputy chief forecaster Mike Silverstone. The highest temperatures are currently forecast in East Anglia and south-east England, where highs of up to 36°C could be reached by Thursday. “A fairly widespread heatwave is likely across large parts of England and Wales, with hot conditions developing in places. "East Anglia and south-east England, however, could see temperatures even higher on Thursday.