Also relevant: how many gasoline-powered cars catch fire every day (lots), and how many Tesla fires injured their occupants (zero)?
It's not news because it's so frequent.
http://www.nfpa.org/research/reports-and-statistics/vehicle-...
roughly: 656 fires and one death every day
http://www.nfpa.org/research/reports-and-statistics/vehicle-...
How many relatively recently sold modern gasoline vehicles in a similar category to the Tesla catch on fire? That's the proper number for the comparison.