Climate and environment updates: 7 key measures of Earth's health in danger, report warns

On Monday, President Donald Trump announced his intention to withdraw the United States from the Paris Agreement, the U.N.-backed international climate treaty. Bloomberg Philanthropies announced Thursday that they, along with a coalition of climate charities, would step up and ensure that the U.S. meets its obligations under the Paris Agreement, including any financial and reporting requirements.

"While government funding remains essential to our mission, contributions like this are vital in enabling the UN Climate Change secretariat to support countries in fulfilling their commitments under the Paris Agreement and a low-emission, resilient, and safer future for everyone," said Simon Stiell, United Nations climate change executive secretary, in a press statement.

This is the second time Trump has withdrawn the country from the Paris Agreement. During his first term, Trump justified backing out of the treaty by claiming that participating in the agreement would result in the loss of jobs and cost the U.S. trillions of dollars. In reality, in 2023, clean energy jobs grew at more than twice the rate of the overall U.S. labor market and accounted for more than 8.35 million positions, according to a Department of Energy report. In terms of spending, the U.S. has committed several billion dollars to the effort, not trillions.

Michael Bloomberg, a billionaire businessman, founder of Bloomberg Philanthropies and a U.N. Secretary-General's Special Envoy on Climate Ambition and Solutions, said he also plans to continue supporting a coalition of states, cities and businesses that are working to reduce U.S. greenhouse gas emissions by 61-66% below 2005 levels by 2035.

"More and more Americans have had their lives torn apart by climate-fueled disasters, like the destructive fires raging in California. At the same time, the United States is experiencing the economic benefits of clean energy, as costs have fallen and jobs have grown in both red and blue states. The American people remain determined to continue the fight against the devastating effects of climate change," Bloomberg said.

While its impact varies from disaster to disaster, extensive research has found that changes in our climate are making extreme weather events like heat waves, hurricanes, flooding and wildfires worse. Now, a new analysis shows us just how costly these natural disasters were in 2024.

Munich Re, a reinsurance company, found that natural disasters in 2024 caused $320 billion worth of financial losses worldwide. That's $52 billion more than in 2023. And of those losses, the company says less than half were covered by insurance.

According to the company, weather catastrophes were responsible for almost all of the financial loss. They say 93% of overall losses and 97% of insured losses were caused by severe weather like floods, wildfires, thunderstorms and tropical cyclones. Hurricanes Helene and Milton took the top spot for the most destructive disasters of 2024.

Munich Re says 2024 was also the third-most expensive year in terms of insured losses and the fifth-most costly for overall costs since 1980.

"The physics are clear: the higher the temperature, the more water vapour and therefore energy is released into the atmosphere. Our planet's weather machine is shifting to a higher gear. Everyone pays the price for worsening weather extremes, but especially the people in countries with little insurance protection or publicly funded support to help with recovery," said Munich Re's chief climate scientist, Tobias Grimm, in a statement.

-ABC News climate unit's Matthew Glasser

In a new quick-turn analysis, UCLA climate scientists found that climate change could be responsible for roughly a quarter of the extreme vegetation dryness present when the Palisades and Eaton fires began. But they say the fires would still have been extreme even without that moisture deficit.

"We believe that the fires would still have been extreme without the climate change components noted above, but would have been somewhat smaller and less intense," the team noted.

The climate scientists at UCLA's Climate & Wildlife Research Initiative considered what contributed to the fire "to quantify how unusual these factors are, in the context of the natural weather and climate variability."

The researchers examined the intense summer heat, drought and extreme precipitation that impacted the region in recent years. They concluded that the unusually warm temperatures during the summer and fall of 2024 are the most likely way climate change could have helped intensify the wildfires by lowering fuel moisture in the region.

However, the analysis found that this stretch of unusually warm weather was likely not the primary driver of the extreme vegetation dryness that was in place at the time of the wildfires.

Researchers point to the lack of early wet season precipitation as the main contributor of the extremely dry fuels, estimating that about 75% of the dryness was due to lack of rain and roughly 25% attributed to the stretch of anomalous warmth. They say the current rain deficit is more likely due to California's highly variable natural climate rather than human-amplified climate change.

"As I've often said, no one claims that climate change directly causes natural disasters. Instead, we highlight that human-caused climate change amplifies these events. As this issue becomes more pronounced, it's essential that we focus on mitigation, adaptation, and planning for the warming that is already inevitable," explained Ginger Zee, ABC News chief meteorologist and chief climate correspondent.

Based on their findings, the research team recommends aggressively suppressing fire ignitions when extreme fire weather is forecast, making homes more fire resistant, and building new units in low wildfire risk zones.

The analysis has not been peer-reviewed and additional findings are likely to emerge as new studies are completed.

-ABC News Climate Unit

The devastating wildfires in Southern California were fueled by a perfect storm of weather and climate factors. While the exact causes of the fires are still under investigation, the conditions that led to their rapid spread are a combination of a lots of rain followed by extreme dryness and powerful winds. We also know that climate change is amplifying the intensity and destructiveness of wildfires in general.

After a period of massive amounts of rain and flooding, Los Angeles has only seen 0.16 inches of rain since May 6, leaving the region exceptionally dry and filled with fuel for potential fires. But dryness alone wasn’t enough to create the chaos. An extraordinary mountain wave wind event, with gusts reaching 100 mph, spread the flames uncontrollably. At that point, firefighters were not going to be able to stop them.

The National Weather Service had warned of these conditions 36 hours before the fires began, calling them “life-threatening and destructive.” Unlike a similar wind event in 2011, this year’s extreme dryness and a unique atmospheric setup made the winds even more devastating, spreading fires to areas not typically impacted by those weather conditions.

While climate change’s exact impact on these fires is still under study, scientists agree that along with rapid urbanization, human-amplified climate change is intensifying dry-wet cycles that increases vegetation growth followed by extreme drying. This hydroclimate whiplash, along with more extreme heat, is contributing to wildfires being larger and more destructive.

-ABC News Chief Meteorologist and Chief Climate Correspondent Ginger Zee, ABC News meteorologist Dan Peck, ABC News Climate Unit’s Matthew Glasser and ABC News meteorologist Dan Manzo