CHENNIMALAI, India – There is river and beach sand aplenty in Tamil Nadu. At 130,000 square kilometers (50,200 square miles), the state is about the same size as Nicaragua and has 95 rivers with sandy bottoms and a long Bay of Bengal shoreline. Or did. For almost all of its thousand-year history, the state of Tamil Nadu took all that sand for granted. No longer.

TIRUNELVELI, India – Just after dusk on a warm mid-January evening, attorney DA Prabakar greeted several visitors on the dimly lit street in front of his home here in southern India. The air was desert-dry and dusty in this rain-scarce river city.

In a recent article for New Security Beat, Colin Walch made the case that the abandonment of some communities in Mali to deal with climate change on their own has created “fertile ground” for jihadist recruitment. In a similar argument, Katharina Nett and Lukas Rüttinger in a report for adelphi asserted last month that “large-scale environmental and climatic change contributes to creating an environment in which [non-state armed groups] can thrive and opens spaces that facilitate the pursuit of their strategies.”

CHENNAI, India – T. Rajan tried all manner of entrepreneurial enterprises. He sold scrap paper and cardboard to recyclers. He built a street corner chai and cigarette cart, and repaired truck and bus tires. He started an office cleaning service for high-tech companies in the growing IT sector south of the city center. None of these delivered the financial returns and workday flexibility of selling clear, sky blue, 20-liter water “cans” in Chennai’s immense bottled water industry.

The epicenter of violence in the unstable country of Mali has historically been in the north, a contested region from where Touareg separatist and jihadist armed groups launched an insurgency against the state in 2012. But over the last two years, there has been a marked shift in communal and anti-state violence to the central region, and climate change may have played a role.

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.