SINGAPORE, Singapore — Typhoons in Southeast Asia are forming closer to coastlines, intensifying more rapidly and lasting longer over land due to climate change, according to a joint scientific study released on Wednesday. Coastal communities and cities like Hai Phong in Vietnam and the Thai capital Bangkok are "facing unprecedented threats from longer lasting and more intense storms", a statement about the study said. Published in the peer-reviewed Nature partner journal Climate and Atmospheric Science, the study "highlights significant changes in tropical cyclone behaviours in Southeast Asia". It added that climate change, which has caused ocean waters to warm, can alter the paths of tropical storms in the region, home to more than 650 million people. "There were two takeaways: First, we should be acting to reduce emissions, so we can curb the impacts of future storms," Andra said.