AUGUSTA — A new report says climate change could raise the ocean level near Acadia National Park by a few feet, threatening low-lying park roads, saltwater and freshwater marshes.

The report, released Wednesday by the Rocky Mountain Climate Organization and the Natural Resources Defense Council, also points to scenarios saying Acadia could become as hot as Atlantic City, N.J.

The report’s lead author, Stephen Saunders of the Rocky Mountain Climate Organization, says human disruption of the climate is the greatest threat ever to America’s national parks.

Report authors say climate change will come at a great cost in terms of tourism to Acadia and Maine.