The Salt Lake Valley is expecting "the big one" (earthquake) anytime. There is a greater than 40% chance of a 6.75+ earthquake along the Wasatch fault within the next 50 years. 80% of Utah's population lives along the front including the fault. Because the valley is an old lakebed, that means much of the ground would experience liquefaction. Approximately 140,000 buildings wouldn't be ready for it. It'd be pretty bad. One source, but the best is a government report from years back detailing how bad it could be.
I think there have been mitigation efforts. I'm pretty sure I'd personally be fucked, given the age of the house I'm renting and its proximity to the fault, but a lot of people would be okay!