Getting home was less stress than I'd feared. My cousin drove me to the new terminal of the Madrid Barajas airport in no time. Flight left on time, arrived in a timely fashion with all luggage accounted for. I gave up a chorizo sausage to the customs agent, which turned out be well worth it as he looked at my card, said "Brooklyn? Good luck!" but then directed me to the B15 bus, which left a few minutes later. An hour in the bus, following our progress on my smartphone, 30 minutes' brisk walk along Bergen Street, amazed that so many trees still have their leaves, and I was home! (And so was the other, hidden, chorizo.)
I think there'll be a fair amount of brisk walking in the coming days...