About those melting CD's and tapes - I make it a habit to drape a dark cloth over my windshield on a hot day. It goes on the outside, to prevent solar gain from light going through the glass. There's enough cloth to pinch in the doors and go under the wipers, so as to hold it in place.

At an auto parts place I ordered plastic guards that go over the tops of the windows. They make it possible to keep the windows open a bit so heat can go out and rain won't get it.

Without these things, the interior would get so hot that I can't touch the steering wheel. Such heat does a lot of damage to upholstery as well as to CD's.
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Joe, to answer your question 'What is folk music?' - it is any music you can perform while wearing a plaid shirt.

Is there anything else you needed to know?