The Appalachian Mountains, the Rocky Mountains, and the Pacific Coastal Ranges and some parts of Alaska and Hawaii have severe landslide problems.
(The Appalachian Mountains, the Rocky Mountains, and the Pacific Coastal Ranges and some parts of Alaska and Hawaii; have; severe landslide problems)
The Appalachian Mountains, the Rocky Mountains, and the Pacific Coastal Ranges and some parts of Alaska and Hawaii
have
severe landslide problems