5. Moreno Valley
Population: 202,976
Just like the other cities in Inland Empire, Moreno Valley’s proximity to San Andreas Fault System could prove extremely dangerous in case of a big earthquake. San Jacinto Fault Line, a San Andreas Fault branch, passes beneath city’s Western suburbs, with maximum possible earthquake predicted at 7.2 magnitude. The fact that Sam Andreas main branch is just 15 miles away and Elsinore Fault Line mere 12 doesn’t help residents of Moreno Valley sleep better at night.