This event shouldn't necessarily stoke your fears about electric cars. Analysis of NTSB data and insurance claims shows that battery-electric vehicles are only responsible for 25 fires per 100,000 sales, as compared to 1530 fires per 100,000 internal-combustion vehicles. Still, fires from EVs are often more difficult to extinguish thanks to the burning temperature of lithium-ion batteries.
Well this is concerning:
https://www.foxbusiness.com/lifestyle/ford-battery-fire-caused-lightning-production-stoppage
Hope we can get some details soon about what they found and if all vehicles are tested for the condition.