Question

Is this a fragment?
Even though people may not be able yet to predict natural disasters with certainty, they can try to be prepared.

Answer 1

Nope that is a complete sentence, unless there is an underlined part that you forgot to indicate. "Even though people may not be able yet to predict natural disasters with certainty" - would be a sentence fragment on its own, therefore a dependent clause on the independent clause, which in this case would be "they can try to be prepared" which is also a complete sentence~

Answer 2

Yea, what I said^