Here is the USAR list of personal equipment, a number of items are for cold weather and can be adjusted downward. The individual must be part of some operations group having some type of self-sustaining infrastructure for food, water, hygiene and rehab otherwise they will simply compound the problem.

Boots, Safety, black, Gore-Tex, ANSI/OSHA or NFPA compliant
Flashlight, battery, intrinsically safe, UL rated, w/ four spare
Hearing protection ear plugs, must meet ANSI S3.19-1974
Helmet, rescue-type, low profile, ANSI/OSHA
Helmet light, Intrinsically safe (with 2 spare bulbs
Knife, combination, folding (Leatherman-type or equivalent)
Leather work gloves, ANSI/OSHA Compliant
Lip balm, SPF 15 min
Rain gear
Safety glasses with keepers, shatter proof, with side shields, must meet ANSI Z87.1-1989 and NFPA standards
Uniform, Pants and Overshirt or Blouse, BDU Style, Navy Blue, 100% Cotton
Uniform, Jumpsuit, or two piece, Nomex IIIA
Uniform jacket, with liner M-65 or equivalent, Navy
Wool cap
Bandannas
Pack, Field, personal, system (hydration bladder optional)
Bag(s), Gear, personal equipment
Gloves, Gore-Tex/thinsulate, ski-type
Shorts, uniform, BDU Style, Navy Blue, 100 % Cotton
Heavy sweater, or equivalent, Navy Blue
Cold weather system, including jacket, pants, fleece or fiberpile liners, socks, gator, knit cap, neoprene mask, expedition long underwear,
Long underwear, medium weight
Socks, Boot
Toiletry kit, including all personal hygiene items, such as Chap Stick soap, lotion
Respirator, halfface, cartridge type, with cartridges
Pouch, Personal tool with assorted tools (ie. Screwdriver, crescent
wrench, tin snips and utility knife)
Field Operations Guide, FEMA, US&R
Hood, fire retardent