Political analysts say the rush of plans is a sign that the issue has gained remarkable traction on the national stage, as scientific reports conclude that climate change is leading to dangerous outcomes for humanity, including more powerful hurricanes, stronger droughts and shortages of food and water. The forum comes as Hurricane Dorian moves “dangerously close” to Florida after inflicting devastating damage to the Bahamas, where at least seven people died.

Ms. Warren’s new climate plan explicitly adopts ideas from Gov. Jay Inslee of Washington, who focused his presidential campaign on combating climate change but dropped out last month after it became clear he was unlikely to qualify for the next primary debate. Ms. Warren met with Mr. Inslee last week in Seattle, according to two people familiar with their discussions.

“While his presidential campaign may be over, his ideas should remain at the center of the agenda,” Ms. Warren wrote in her new climate plan.

Mr. Inslee released six detailed climate plans, totaling over 200 pages, which were widely praised by environmental policy experts for their rigor. He said he hoped they would help “raise the ambition” of other candidates’ climate policies, and he has since had conversations with several candidates about how to incorporate his ideas into their plans, said his former campaign spokesman, Jared Leopold.