Judy Woodruff:

A grave new warning today about a warming world. The United Nations Intergovernmental Panel on Climate Change says chances of preventing the worst effects are fading. The group says net carbon emissions must drop drastically by 2030. And it says that that will take unprecedented action.

William Brangham will have a full report later in the program.

A new hurricane is taking aim at the Florida Panhandle. The storm dubbed Michael moved past Western Cuba today, headed into the Gulf of Mexico and toward landfall by midweek. Forecasters say it could become a major hurricane with, winds topping 110 miles an hour. The governors of Florida and Alabama have declared emergencies.

Climate change figured in today's announcement of the Nobel Prize in Economics. Yale professor William Nordhaus one for his work on climate in economic modeling, including a proposed carbon tax. Paul Romer of New York University was honored for his research into technological innovation.

President Trump is predicting the battle over Supreme Court nominee Brett Kavanaugh will spur Democrats to vote Republican in the midterm elections. Kavanaugh won Senate confirmation on Saturday. Today, the president said sexual assault allegations against his nominee were — quote — "a hoax."

He followed up in Orlando, Florida.