Just days before the 2016 Summer Olympics began in Rio de Janeiro, the Brazilian city faced an unsavory problem: how to handle its overwhelming sewage. Nearly half of Rio’s municipal wastewater flowed untreated into Guanabara Bay, where the waters were so polluted by sludge that direct contact was deemed a health hazard to Olympic athletes.

Pray for rain. Mega-drought. Winter salmon run nearly extinguished. Sierra snowpack dismal. These were just some of the headlines in California newspapers over the last five years during a historic drought that elevated water security to the top of everyone’s minds.

As climate change leads to more weather variability and natural disasters, the need for adaptation is more urgent than ever. The Notre Dame Global Adaptation Initiative (ND-GAIN) aims to enhance understanding of adaptation and inform the public and private sectors on actions and investments.

The World Economic Forum’s 2017 Global Risks Report, like other recent analyses of global trends, notes “rising political discontent and disaffection,” but also significant concern for environmental issues. The forum polled 745 leaders, nearly half of whom are from the business community, on the likelihood and impact of various global risks.

The Earth’s front-line defenders are disappearing at an astonishing rate. On average three environmental activists were killed each week in 2015, according to a recent report from the United Nations special rapporteur on the situation of human rights defenders. Global Witness, an international NGO that documents natural resource extraction, corruption, and violence, reports a 59 percent increase in deaths last year compared to 2014. In total, 185 killings of environmental defenders were recorded by Global Witness in 2015.

As global climate change affects livelihoods across the world, migration patterns are also changing. In a recent study published in Global Environmental Change, Clark Gray, Valerie Mueller, and I found that since the 1970s, climatic variations have been increasing internal migration across many South American countries, with few exceptions. And many people are headed to cities.

Have something to say about the U.S. government’s approach to water around the world? Here’s your chance. The Department of State has issued a public call for comment on its global water strategy. An open session was held in Washington last Friday, but written comments can be submitted until November 12.

For inspiration, here are points made by our own (and American University’s own) Ken Conca, edited for space:

Near the corner of Broadwick and Lexington in London’s Soho neighborhood, a single spot on the ground has influenced more than 150 years of urban development. It’s the location of a water pump that in 1854 physician John Snow pinpointed as the source of contamination leading to a widespread outbreak of cholera in the neighborhood that killed more than 600 people.