Trump Quits Key Treaties Amid 'Increasingly Deadly and Expensive' Weather Disasters

President Donald Trump's withdrawal of the United States from dozens of international treaties and organizations and his administration's cuts to climate research and emergency response come as the frequency, lethality, and cost of major extreme weather disasters grow, according to an analysis published Thursday.

The Climate Central analysis of billion-dollar US weather and climate disasters revealed that 2025 saw the third-highest annual number of such events, trailing only the two previous years. At least 276 deaths and $115 billion in damages are attributable to such disasters.

This analysis also came as California observed the one-year anniversary of wildfires that killed 31 people and caused billions of dollars in damages, making them among the most expensive wildfires on record.

The new research is the first update of Climate Central's US Billion-Dollar Weather and Climate Disasters database, which was launched last October. The resource will help fill an information void caused by the Trump administration's move in May ending updates to the government's own database that tracked climate disasters causing more than $1 billion in damage.

Key findings of Climate Central's update include:

• The past three years rank highest for the annual number of billion-dollar disasters: 2023 (28 events), 2024 (27 events), and 2025 (23 events);
• The number of billion-dollar severe storms set a new record in 2025, with 21 such events, reflecting near-record numbers of damaging high wind and tornado reports during the spring and summer of 2025;
• A billion-dollar drought affected the western US in 2025, and was primarily driven by heat, rather than by a lack of precipitation; and
• The catastrophic flash flooding in the Texas Hill Country in July 2025 was one of the deadliest inland floods in US history—even though it did not even result in economic losses of $1 billion.

"This trend of increasingly deadly and expensive disasters is occurring as the Trump administration continues to defund and cut staff at the National Oceanic and Atmospheric Administration (NOAA), the nation’s foremost science agency whose mission includes tracking and studying weather and climate, and the Federal Emergency Management Agency (FEMA) that prepares for, responds to, and helps communities recover from disasters," the Union of Concerned Scientists (UCS) said Thursday in response to the new research.

Additionally, Trump on Wednesday signed a legally dubious executive order under which the US will become the first country to ever quit the United Nations Framework Convention on Climate Change (UNFCCC), the parent treaty serving as the foundation for international accords including the Kyoto Protocol and Paris Agreement.

Trump's order also pulls the US from the Intergovernmental Panel on Climate Change (IPCC), International Renewable Energy Agency & International Solar Alliance, International Union for Conservation of Nature, and numerous other agreements and organizations, even as the human-caused climate emergency worsens.

Experts stress that this is the opposite of what governments should be doing amid a worsening planetary crisis.

“As a nation, we must invest much more in resilience measures as well as sharply cut the heat-trapping emissions driving climate change," UCS Climate and Energy program senior policy director Rachel Cleetus said Thursday. "This administration has instead clawed back funding for climate resilience projects, politicized disaster aid, and is doing its utmost to boost fossil fuels and worsen the climate crisis. Congress must step up to oppose these harmful actions and help keep people safe.”

Basav Sen, a climate leader at the Institute for Policy Studies, on Thursday noted that the US is "the world’s largest cumulative greenhouse gas emitter, and the largest producer and exporter of oil and gas today."

"By walking away from the UNFCCC and the IPCC," Sen added, "the Trump regime is sending a clear message to the world that the US refuses to take responsibility for its own actions."