The mid-70s brought some documentary series devoted to disasters of various kinds and degrees.
Mobil Oil had mounted a series of shows under the Mobil Showcase umbrella, and among these shows was When Havoc Struck. I cannot recall the frequency of these programs, as there isn't an entry to be found on Wikipedia, for example.
What we do know is that actor Glenn Ford, whose two previous series, Cade's County (1971) and The Family Holvak (1973-4), each were cancelled after 1 season, served as host and narrator. Right now, let's go back to 1978 as Ford tells the story of Hurricane Camille.