I didn't read anything about a 90% dieback.

This is one of those "things slowly get shittier" things. Slowly enough that you can get away with ignoring it for a long time.

The people propagating the news are meteorologists. It's not their job to prepare for it. That's a job for governments, local and national, and international agencies.

Right now the emergent consensus response of the U.S. is to just ignore it all. The people who are worried are just about exactly countered by people who violently deny there's a problem.