The warning comes as parts of England and Wales could reach 33C on Wednesday, with even hotter conditions expected on Thursday as the latest UK heatwave intensifies. Temperatures could climb as high as 38C in some areas, while widespread dry conditions have left parts of the country particularly vulnerable to fires. Firefighters have been battling a blaze in the New Forest as hot and dry conditions continue to affect large parts of the UK. Article continues below ADVERTISEMENTMr Burnham warned that "many of [the wildfires] have been created by disposable barbecues". Highs of around 33C are expected in parts of England and Wales on Wednesday before temperatures potentially reach 38C on Thursday.