Before the 2015 floods that drowned Chennai, Pradeep John spent several years posting thorough and dutifully accurate updates and alerts on Twitter and Facebook as the Tamil Nadu Weatherman. An amateur meteorologist who developed considerable expertise in weather data and satellite imagery, John’s online followers relied on his crisp forecasts and advice.

Recent rises in temperature and typhoon frequency and intensity have resulted in more internal migration in the Philippines, according to an article by Pratikshya Bohra-Mishra et al. in Population and Environment. The authors conclude that temperature change and natural disasters, such as typhoons, can have a significant effect on short-distance, sub-national migration because they reduce rice yields, which is used as a proxy for agricultural productivity.

As more climate change seems locked in – some estimates suggest a 1.5-degree Celsius (2.5 degree Fahrenheit) rise above pre-Industrial averages is guaranteed – more governments are allocating resources to adaptation. Caribbean communities that contribute very little to climate change are some of the most vulnerable, and representatives from many met in October 2016 in Grenada to share experiences and build technical capacity.

CHENNAI, India – Almost a decade ago, when the first of Chennai’s bleach-white IT office buildings replaced coconut groves along the Bay of Bengal south of the city center, leaders hailed the potential for a new wave of clean jobs. Nine years later, it is clear that planners did not fully anticipate the consequences.

Water scarcity has contributed to an “arc of instability” characterized by conflict and displacement that stretches from West Africa to the Middle East, said a panel of experts at the Wilson Center on March 1. Two authors from an upcoming compilation of case studies on water security and violent conflict by World Wildlife Fund gave overviews of challenges in Nigeria and Iran and recommendations for U.S. engagement.

The intelligence community’s landmark Global Water Security assessment in 2012, warned of major water-driven challenges to U.S. national security. The combined assessment of several intelligence agencies foresaw many challenges to U.S. policy objectives and national security arising from protracted drought, declining water quality, and more natural disasters in countries important to U.S. interests. The intelligence community further warned of rising social instability, cross-border tensions, and a steady drain of resources away from other development objectives. These warnings have proven prescient.