Today is the 100th anniversary of the devastating San Francisco earthquake of 1906. Hundreds of people died. Despite modern technologic improvements in "earthquake-proofing" buildings, most of the existing buildings were built before such improved standards. When the next "big one" comes (that's when, not if), based on those previous casualties vs. population, they are predicting upwards of 26,000 people will perish.
There's a happy thought.