Record temperatures last year pushed the global water cycle to “new climatic extremes,” according to the Global Water Monitor 2024 report. The document, produced by an international consortium led by researchers at Australian National University, states that these climatic anomalies caused devastating floods and droughts that resulted in more than 8,700 deaths, the displacement of 40 million people, and economic losses exceeding $550 billion.
The report was conducted by an international team and was led by ANU professor Albert van Dijk. It reveals that 2024 was the warmest year so far for nearly 4 billion people in 111 countries, and that air temperatures over the Earth’s surface were 1.2 degrees Celsius higher than documented at the beginning of the century and 2.2 degrees Celsius higher than at the start of the Industrial Revolution.
Van Dijk asserts that water systems around the globe were affected. “From historic droughts to catastrophic floods, these severe climate variations affect lives, livelihoods, and entire ecosystems. Water is our most important resource, and its extreme conditions are among the greatest threats we face,” he says.
The report authors analyzed data from thousands of ground and satellite stations that collect near real-time information on critical water variables, including rainfall intensity and frequency, soil moisture, and flooding.
“We found rainfall records are being broken with increasing regularity. For example, record-high monthly rainfall totals were achieved 27 percent more frequently in 2024 than at the start of this century, whereas daily rainfall records were achieved 52 percent more frequently. Record lows were 38 percent more frequent, so we are seeing worse extremes on both sides,” says Van Dijk.
The research states that, as a consequence, sea-surface temperatures rose, intensifying tropical cyclones and droughts in the Amazon basin and southern Africa. Global warming favored the formation of slower-moving storms in Europe, Asia, and Brazil, subjecting some regions—such as Valencia in Spain—to extremely high levels of rain. Widespread flash floods occurred in Afghanistan and Pakistan, while rising levels in the Yangtze and Pearl rivers in southern China damaged rice crops.
“In Bangladesh, heavy monsoon rains and the release of water from dams affected more than 5.8 million people, and at least 1 million tons of rice were wiped out. In the Amazon basin, forest fires triggered by the hot, dry weather devastated more than 52,000 square kilometers in September alone, releasing huge amounts of greenhouse gases,” Van Dijk says.
The study adds that changes in the water cycle intensified food shortages, impaired shipping routes, and disrupted hydropower generation in some regions. “We need to prepare for and adapt to inevitably more severe extreme events. That may mean adopting stronger flood defenses, developing new food production systems and more drought-resistant water supply networks,” suggests Van Dijk.
World leaders have pledged to implement measures and policies to prevent global warming from exceeding 1.5 degrees Celsius above preindustrial levels by the end of the century, but the World Meteorological Organization has pointed out that current efforts are insufficient. The WMO estimates that there is an 80 percent chance that the average global temperature will exceed 1.5 degrees Celsius above preindustrial levels again in at least one of the next five years. The projection suggests that humanity is far from meeting the goals of the Paris Agreement and raises new concerns about the progress of climate change.
Securing financial resources is another challenge. The United Nations Environment Program estimates that the funding gap for climate change adaptation is between $194 billion and $366 billion annually.
António Guterres, secretary general of the United Nations, has said that “we are teetering on a planetary tightrope. Either leaders close the emissions gap or we are hurtling towards climate disaster, with the poorest and most vulnerable suffering the most. The countdown to action has begun.”
This story originally appeared on Wired en Español and has been translated from Spanish.
