My minimalist, don't leave home without it clothing kit is a military poncho, ball cap and glove inserts.
If you can keep your brain and hands functioning, a fire or expedient shelter can be secured.
The poncho, gaiters, a "Jeep" cap, and gloves are part of my all season car kit. Amazing how warm a poncho and a couple of hand warmers can keep you if you have to "tuck" up.