[londons_explore]

I'd be interested to see an analysis trying to track down the exact lightning bolt that started a fire. 100% of lightning bolts are now mapped by various open source websites to a precision of hundreds of yards. That, combined with lucky satellite shots a few hours afterwards should be enough to confirm the fire started in the same place as the lightning bolt.

Using that, it should be possible to identify what percentage of fires were in fact started by humans who were never identified (due to there being no lightning bolt within a few hours of the fire starting)

[ipsum2]

It's not hard to figure out that lightning is the the root cause for these fires. Lighting storms occurred only once this summer in California, and fires were noticed immediately the day after.

Unless there were a committed group of arsonists that wanted to use the lightning storm as a cover and worked to set fires on the same day that has a similar signature to lightning.