Some 2,300 people are likely to have died of heat-related causes across 12 European cities during a severe heatwave, according to a new study. India is currently the leading country of origin for billionaire immigrants in the US, Forbes noted in its ‘America’s Richest Immigrants 2025' list. For all the latest world news, analysis and updates, NDTV's 'The World 24X7' with Parmeshwar Bawa is your one-stop shop.