KARACHI, Pakistan Nearly 90% of South Asia’s population will be at risk of extreme heat and almost one-quarter at risk of severe flooding by 2030, a new World Bank study warned on Monday. The report, titled “From Risk to Resilience: Helping People and Firms Adapt in South Asia,” based on case studies from Bangladesh, India and Pakistan, said South Asia is one of the world’s most climate-vulnerable regions due to its dense population, rising temperatures and exposed geography. The study said the