It's been awhile since I've seen this movie (image picture), so I don't remember all of it, just little pieces here and there. I thought it was ok, not great.
It was made during the 70s when they made films using all the horrible natural scenarios that their brains could muster up.
The big ones were Airport, Airport 75, Airport 77, Airport 79, Towering Inferno, Earthquake, Meteor, The China Syndrome, Black Sunday, etc.
It was a risky time to live in, at the movies anyway.