President Donald Trump signed an executive order Monday directing the United States to again withdraw from the landmark Paris climate agreement, dealing a blow to worldwide efforts to combat global warming and once again distancing the U.

Trump’s day-one actions on energy come as climate change-fueled fires ravage Southern California, following the globe’s hottest year on record.

President Donald Trump will pull the U.S. out of the Paris climate agreement, according to an executive order signed Monday as one of his first acts after taking office.