Ard, in the great Dust Bowl, hundreds of thousands, possibly milliions of Okies were displaced.
Is that evidence that nobody cared?
In New orleans, hundreds of thousands were warned to evacuate, but offered no transport. Thousands of survivors were left in a stadium for days with no supplies, then trivial amounts were thrown from helicopters and they were left to fight over it.
The government failed, but people did care and charities did what they could.