Tips for surviving inside your cold house

My family and several friends live in the Dallas Ft. Worth, Texas area. Watching a WFAA TV News feed this morning they had a short interview with Chrystal Smith from the local American Red Cross. She offered a few tips for conserving heat energy inside your home. Thought this might help someone out there in the extreme chill this AM.

(1) Shut all doors in your home and place towels under each door to conserve heat energy
(2) Wear loose fitting clothing and lots of layers
(3) All people in one room

She also said that several Warming Centers had been opened providing cots, blankets, water and snacks. Check your County Website or with the American Red Cross for more information.

These are just 3 tips that can help and I'm sure there are more. Hoping others hear have helpful and practical suggestions or experience to share. Also, check on elderly neighbors and others who may need assistance right now. Many are without power or heat trying to get through this dangerous and historical weather event.

EDITED TO ADD:I posted this today for 2 reasons. First was to make ideas and suggestions available to those who could immediately put them to work. It did that.

Second was to get ideas on this subject for my afternoon phone call today with my Senior parents in DFW. They are doing fine and are safe tonight!

I thank everyone who responded. Another fine example of the kind and resourceful people here on DU. If these types of posts (from this one and others) have helped even one person be a little warmer, or a little less afraid or even just a little bit safer, then it has been worth everyone’s effort!
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EDIT 2: Here's another link to a similar and helpful thread by Peacetrain earlier today. Thank You!:

Good ideas to share with all the DU'er's stuck in the freeze zone.
https://democraticunderground.com/100215116550
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EDIT 3:
ADDING AN IMPORTANT LINK FROM THE CDC SITE ON CARBON MONOXIDE POISONING

CO poisoning is entirely preventable. Protect yourself and your family by learning the symptoms of CO poisoning and how to prevent it.

“Never run a motor vehicle, generator, pressure washer, or any gasoline-powered engine less than 20 feet from an open window, door, or vent where exhaust can vent into an enclosed area.”

“Never use a charcoal grill, hibachi, lantern, or portable camping stove inside a home, tent, or camper.”

“Never run a generator, pressure washer, or any gasoline-powered engine inside a basement, garage, or other enclosed structure, even if the doors or windows are open.”

More at link:
https://www.cdc.gov/nceh/features/copoisoning/index.html

Another link at the CDC to their "Carbon Monoxide Poisoning Website" with more information.
https://www.cdc.gov/co/default.htm
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There were LOTS of Posts in the last couple of days (not referenced here) with helpful info and experiences from other DU'er's. Search them out and stay warm out there!