this is bbc news. it s newsday. hello and welcome to bbc news, broadcasting to viewers in the uk and around the world. it s six in the morning here in singapore and ”pm in london, where the uk has recorded temperatures of more than a0 degrees celsius for the first time. the heatwave has caused widespread disruption on the railway network, and there have been a large number of fires in parks and grasslands. a major incident has been declared in london, where the mayor, sadiq khan, said fire crews were struggling to cope. this comes as the un s climate chief has warned that heatwaves such as the one currently gripping western europe are becoming more frequent. our first report is from our climate editor, justin rowlatt. with today s searing heat came fires, and lots of them. huge plumes of smoke rose above london as grass fires engulfed homes. on the outskirts of the capital. the fire brigade declared a major incident. a number of the calls we have been dealing with today hav