Disaster movies come in and out of fashion over the past several decades. The 1970s being the subgenre's Golden Age (of sorts) for painfully earnest/realism.
Do you prefer realism in your disaster movies? Or the impossibly fantastical (zero science involved) disaster movies of late. EG: Roland Emmerich's The Day After Tomorrow, 2012, and his upcoming Moonfall?
Has movies revolved around airplane crashes turned you off of flying altogether?
I like War of the Worlds, the most recent version with Tom Cruise.
It's scary, terrifying, but it was resolved and things turned out in the end.
I think the modern version could be interpreted as a nuclear war, but portraying a nuclear war would be too depressing and hopeless, and it could not be portrayed as entertainment in any sense of the word.
People would be running from the cities because they would be the epicenters of destruction. Food would be unavailable or contaminated with radioactive dust. People would be escaping en masses with no place to escape to.