disaster /dɪˈzæs.tɚ/ (plural disasters)
Or from Wikipedia's Disaster portal,
It could be argued that Global Warming and Climate Change aren't immediate (like most disasters) or are a cause of disaster more than a disaster itself, but suffice it say that climate change's horrendous impacts across the globe make this more a matter of semantics. Climate change is a manmade disaster - something we all can work to prevent and affects us all.
For recent news & studies looking at the impact of climate change in relation to disasters, check out these VashonBePrepared blogs for current reporting on the subject we have noticed.
The U.S. Global Change Research Program (USGCRP) coordinates and integrates federal research on changes in the global environment and their implications for society. Their reports on climate change's national impact - as well as the changes specific to the Pacific Northwest highlight the scope and scale of the impact for us in Washington: