Tourists visiting their favourite spots around the world could be in for a killer heat shock as El Nino threatens to roast visitors sightseeing in cities. A shocking new study revealed hundreds of cities are at risk from the global temperature shock as El Nino arrives, with many being in the top 50 tourist destinations, such as Bangkok. University of Oxford scientists analysed the vulnerability and coping capacity of 220 major cities around the world . The result show some 95 per cent of the