I mean, really, how does one film cover the immensity of water? And how does a person take it all in without feeling water-boarded? Last Call at the Oasis figured it out. The film gives just enough information on a range of subjects and uses down-to-earth people who make the issues understandable. I didn't drown in scientific garble! I especially appreciated the Tyrone Hayes' segment on atrazine, a herbicide that has been in the Cornbelt's water (and Midwestern bodies) for decades.
I would have given this a 10-star rating, but I think they spent too much time in stargazing at Erin Brokovich. They could have spent some of that time bringing in an expert from the National Oceanic and Atmospheric Administration who could explain more about storm surge and how we need to prepare for water's destructive forces.
I wish I left the theater more optimistic than when I went in, but I guess filmmakers can't produce miracles. Only truth.