California Gov. Gavin Newsom (D) signed "some of the nation’s most aggressive climate measures in history" to combat human-caused climate change into law on Friday.

Why it matters: The legislative package "complements" the $54 billion in climate funding included in the state's budget earlier this year, Newsom's office said. The new laws come as the state nears the end of a harsh summer that brought record-breaking heat that tested its power grid and contributed to major wildfires.

What they're saying: “This month has been a wake-up call for all of us that later is too late to act on climate change. California isn’t waiting any more,” Newsom said in a statement Friday.

The big picture: The laws also require the state to stop contributing carbon dioxide to the atmosphere by 2045, which will require it to slash emissions by 85%.

Go deeper: Heat wave in West breaks records, threatens California grid