The Bulletin of the Atomic Scientists sees increased threats to global survival from nuclear weapons and climate change—and President Trump.
More than a third of India’s electricity supply is at risk from water scarcity, which also threatens urban life in parts of South Africa.
Global warming took surface temperatures in 2017 to near-record levels, while the upper oceans reached their hottest known level.
The organization expects a global rise of 3 degrees Celsius by 2100, even if countries cut their greenhouse gas emissions as promised in 2015.
Experts warn that while climate change did not cause Hurricane Harvey, its destructiveness has almost certainly been intensified by global warming.