When I arrived at Bangladesh’s Cox’s Bazar in July, the infamous monsoon was well underway. The rain was intense, roads were muddy, and it was very difficult to move around. Cox’s Bazar—the closest big town to the Rohingya refugee camps—is now the base city for most of the humanitarian agencies working with the refugees. The distance between Cox’s Bazar and Kutupalong Camp—the world’s largest refugee camp—is barely 30 kilometers. However, due to the rain and the area’s hilly terrain, it seemed like it took ages to get there.

As the Atlantic hurricane season kicks off this month, some coastal communities in the United States and small-island nations in the Caribbean are still recovering from last year’s record-breaking damage. At the same time, the heavy rains pounding the East Coast this week are part of a long-term trend towards more severe heavy rainfall events that have led to deadly floods and threaten critical U.S. military bases. Even on sunny days, cities such as Norfolk and Manila contend with high tide or “nuisance” flooding—a phenomenon that has increased as much as nine-fold since the 1960s, according to NOAA.

“Community mobilization, local capacity-building, and innovation are the cornerstones of successful development. And that for us includes resilience,” said Franklin Moore, Africare’s Chief of Programs, at a Wilson Center event on family planning and sustainable development. As rapid population growth intersects with challenges like food insecurity and water scarcity, communities in developing countries need not only the capacity to absorb short-term shocks, they also need transformative capacity to address long-term challenges.

Water variability is increasing “due to climate change and to more frequent natural disasters,” said Jonathan Cook, Senior Climate Change Adaptation Specialist with the U.S. Agency for International Development, at the fourth and final event in a series on water security organized by the Wilson Center and the Sustainable Water Partnership. To solve the problem of increasingly erratic water, “business as usual is really not acceptable anymore,” said Will Sarni, founder of WetDATA.org, who called for new, innovative ideas: “Hope is not a strategy.”

The Lanjiang river in Eastern Zhejiang, China, reached its peak water level of 100 feet the night of June 25, 2017. Lanxi residents remember this day as “6.25,” marking the worst flood since 1955. Elsewhere in China that month, 7.3 million people were affected by floods, landslides, and heavy rains in northwestern Sichuan Province alone. Northern Guangxi suffered direct economic losses of 2.9 billion RMB (US$460 million). In the autonomous regions, 92,000 people were relocated. Flash floods caused the deaths of 10 people and forced 76,800 people to evacuate from Shanxi Province.

Natural bioshields—wetlands, forests, and urban green spaces—are critical tools for reducing the impacts of disasters on vulnerable communities. Between 1994 and 2014, nearly 7,000 natural disasters occurred worldwide, causing an average of almost 68,000 deaths each year. Climate change, growing populations, and widening economic inequality are all expected to increase the impacts of disasters. Bioshields—nature’s own solutions to natural hazards—can help protect people from these dangerous floods, storms, and heat waves.

“Most risk in African cities is not catastrophic. It’s not even episodic, but it is every day,” said Mark Pelling, a professor at King’s College, London, at a recent event on urban risk and resilience in sub-Saharan Africa. With rates of rural-to-urban migration reaching record highs, more than half of the urban residents in sub-Saharan Africa live in informal settlements, where they lack basic infrastructure and access to critical resources. Integrated projects like Pelling’s Urban ARK seek to build more resilient communities in cities and informal settlements. “African cities are dynamic and are growing,” said Pelling—but so is the vulnerability of their residents to environmental change, natural disasters, and conflict.

“Floods are one of many factors that keep massive amounts of the population in poverty and always on the brink of disaster,” said Eric Viala at the second event in a four-part series on water security organized by the Wilson Center in cooperation with the Sustainable Water Partnership, which Viala directs. Panelists at the event discussed the impact of intense flooding on vulnerable communities and proposed innovative and collaborative approaches to reducing their risks in the face of disasters.