This is a strictly low budget, paint-by-the-numbers, greed-head-business -person-causes-disaster movie, though there is not much disaster save for some rather severe dermatitis and a few annoying characters who get killed off.
It starts with three college student campers -- they look thirty-ish -- who pitch their tents across a creek from an ultra hot, Chippendales' quality genius -- graduate degree from Stanford at age 17 -- who lives as a hermit in a tent with a chemistry set. He resents the quarrelsome threesome invading his privacy but after three or four passive-aggressive snippy encounters he bonds with them. He is pretty deadpan, not at all like a boy prodigy, with little dialog, like he has some sort of spectrum disorder.
Then the fun begins. A storm is brewing and the inexplicably horseshoe shaped forecast track has it coming right over the campsite. When it does, the precip has battery acid-like qualities. Mayhem ensues.
Fortunately the acid rain does not damage windshield wiper blades or tires (it actually Vulcanizes them, we are told, makes then stronger!) so an escape can be started. Trees are fine too. But it is hell on a paint job. And it is like a chemical peel on unsuspecting humans.
Blah blah blah fast forward and we learn all about about an evil businesswoman. A greedy anti-green ore mining company. Some ridiculous plot turn involving a past relationship between two of the characters. It is not really explained. And a corrupt veterinarian / spokesperson for the company.
This is all like a really bad SciFi Channel movie meets Hallmark Channel. OK for wasting time. But not if you are looking for something serious, thoughtful.
