Britain’s London Luton airport has been forced to suspend arriving flights until further notice after a section of runway tarmac melted amid the heatwave currently gripping the nation and much of Europe. About 14 flights due to land at Luton had been diverted to other airports as of the afternoon of June 18, 2022. Departure runways, which had also been closed earlier because of the hot weather, were reopened. Sweltering temperatures also prompted runway concerns forcing flight suspensions at a…