Disasters came up twice. Both in reference to and on the broader topic of climate change. Sorry, I can't recall who said what, but it was two different candidates. The two references were:
1. The connection between climate and the destructive nature of disasters that we are seeing now as a result of climate change.
2. It was mentioned that it is the poor who suffer most from disasters.
Is this a breakthrough of any sort? Talking about disasters and really doing something about them are two different things. However, here-to-date, nothing has ever been said about disasters in my memory going back through Clinton's election and debates.
I do think that the frequency, size and price of climate and other disasters will make this more of a recurring topic going forward in future election cycles.