America’s bridges are in rough shape. Of the nearly 620,000 bridges over roads, rivers and other waterways across the U.S., more than 43,500 of them, about 7%, are considered “structurally deficient.” In Alaska, bridges face a unique and growing set of problems as the planet warms. Permafrost, the frozen ground

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As a climate scientist myself, I was excited to learn that Syukuro Manabe, Klaus Hasselmann and Giorgio Parisi have been awarded the 2021 Nobel Prize for Physics. I first met Manabe when I was a graduate student in the early 1970s, so I was particularly pleased that the prize recognizes

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Extreme urban heat exposure has dramatically increased since the early 1980s, with the total exposure tripling over the past 35 years. Today, about 1.7 billion people, nearly one-quarter of the global population, live in urban areas where extreme heat exposure has risen. Most reports on urban heat exposure are based

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Extreme urban heat exposure has dramatically increased since the early 1980s, with the total exposure tripling over the past 35 years. Today, about 1.7 billion people, nearly one-quarter of the global population, live in urban areas where extreme heat exposure has risen, as we show in a new study released

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The Chagos Archipelago is one of the most remote, seemingly idyllic places on Earth. Coconut-covered sandy beaches with incredible bird life rim tropical islands in the Indian Ocean, hundreds of miles from any continent. Just below the waves, coral reefs stretch for miles along an underwater mountain chain. It’s a

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Rising temperatures due to climate change are causing more than just uncomfortably hot days across the United States. These high temperatures are placing serious stress on critical infrastructure such as water supplies, airports, roads and bridges. One category of critical infrastructure being severely affected is the nation’s K-12 schools. Ideally,

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If you’ve never lived in or visited the U.S. Southwest, you might picture it as a desert that is always hot and dry. But this region experiences a monsoon in the late summer that produces thunderstorms and severe weather, much like India’s famous summer deluges. And this year, it generated

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Land–based heatwaves have a less obvious though equally important sibling: marine heatwaves. In 2013, the largest marine heatwave on record began when an unusually warm mass of water formed in the Gulf of Alaska. By the next summer, the warm water spread south, raising average water temperatures along the United

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Electricity generation produces a quarter of U.S. greenhouse gas emissions that drive climate change. The electric grid also is highly vulnerable to climate change effects, such as more frequent and severe droughts, hurricanes and other extreme weather events. For both of these reasons, the power sector is central to the

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The United Nations is preparing to host pivotal conferences in the coming months on two global crises: climate change and biodiversity loss. As experts have pointed out, these issues are fundamentally, inescapably intertwined. In both cases, human activities are harming nature and the support it provides to people. But that

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