1906 San Francisco earthquake aftermath

The SF earthquake of 1906 is considered to be one of the worst natural disasters in the US. Almost 80% of SF was destroyed from the earthquake and fires. Oh and about those fires, well, it was a war zone... Bunch of people were insured in case a fire happens, but not many were insured against an earthquake. So people, being in fear of insurance not covering their earthquake damaged houses, did the next most logical thing - they set their houses on fire.

If you're going to San Francisco...

One fire was so great that they had to blow up chunks of buildings (literally stack TNT in a place) around a few city blocks so they would collapse and stop the fire from spreading. They even used artillery. Soon enough, the army moved in to help and they kinda stopped the looting and helped people. They even shot men who were trapped on rooftops and wanted to jump. All in all, a 10/10 tragedy.