AGADEZ, Niger — The world dismisses them as economic migrants. The law treats them as criminals who show up at a nation’s borders uninvited. Prayers alone protect them on the journey across the merciless Sahara.

The world of 2035 will be facing global and regional insecurities that could be “more dangerous than the second half of the Cold War era,” according to a 2016 report from the Atlantic Council.

It had been raining for two full days when the landslide came. Nirjala Adhikari vividly remembers the instant it hit her village in Sindhupalchok District, Nepal. “It was a very scary moment, and I couldn’t think of anything else than grabbing my mobile phone and my school certificate before I ran out of the house,” she recalled. “I secured my certificate because only this will help me establish a bright future.”

A report by the European Union on global food security finds 240 million people are in food stress thanks to conflict, refugee situations, flooding, drought, and El Niño. Part of a 2012 commitment by the EU to better target the root causes of food insecurity, the report analyzes the hunger situation in 70 countries and provides deeper analysis for 20.

Drought in Ethiopia, exacerbated by El Niño, has put more than 10 million people in a position of being unsure how long they will have food and where it will come from next. Inevitably, the drought has been compared to the infamous drought of 1983-1984 that led to the worst famine in the country’s history, making millions destitute, and contributing to the deaths of 400,000. But Ethiopia is in a very different place today than it was in 1983.

According to recent polling, climate change is seen as the single most threatening international challenge around the world, and there’s evidence that all that worry is taking a psychological toll. Adding to droughts, floods, extreme weather, and die-offs, psychologists are observing higher levels of anxiety, depression, and post-traumatic stress disorder in certain areas and professions. Even people who do not actively stress about global warming or view it as a major threat may still suffer psychological trauma from its effects.

Karachi, the world’s second largest city by population, is emerging from the grips of a deadly heatwave. A persistent low pressure system camped over the Arabian Sea stifled ocean breezes and brought temperatures in excess of 113°F (45°C) to the city of 23 million people in June. The searing heat disrupted electricity and water service, making life nearly unbearable. All told, officials estimate the heatwave killed at least 1,200 Pakistanis, more than twice as many as have died in terrorist attacks this year.

In 2011 Thailand was hit by unprecedented monsoon rains far above the average rainfall of the previous 30 years. Two million people across 26 provinces were affected. During the crisis, hundreds of civilians took it to the streets to protest discrimination by the Flood Response Operation Center and the unfair distribution of water, electricity supply, shelter, and food. Civilians were so angry that they broke a sandbag wall in Bangkok which was protecting a wealthy district from water surges. Public unrest and discontent with the government continued until a military coup in 2013.