Do I get any of the normal equipment I carry on me? My entrenchment tool should allow me to create a makeshift igloo in that time, at least a windbreak, but if I don't have any fuel for a fire, then sure, I die. If I have any fuel for a fire, and an ignition source, then all I need is a tiny fire to warm me, and not melt my igloo. I also literally carry flint and steel on me at all times.

This scenario actually is literally against my person, who has been moving closer and closer to the equator, because it's still too cold in San Diego, CA.

On the equator I would need some sort of shade and relief from the midday sun, but at least it would always be warm enough.