Solar overheat…..
Check it out:

Firefighters responded late Tuesday morning to a large industrial fire near Phoenix, Ariz. at a site that formerly housed a supplier for Apple.

Investigators believe the blaze started near some solar panels on the roof of the large warehouse hear Signal Butte and Elliot roads and much of the fire’s damage was confined to that area, said deputy chief Forrest Smith, a Mesa, Ariz. fire spokesman.