If your power is out, don’t use fuel/gas/charcoal burning camping equipment inside your home (or your tent) and always have CO alarms with battery backup.
“…three adults and four children get transported to Salem Hospital….cooking with a propane cooker inside the house…those seven people were all unconscious when first responders arrived…the children were revived on the scene, but two of the three adults were in critical condition at last check.”

https://www.kptv.com/news/seven-people-sent-to-hospital-with-carbon-monoxide-poisoning/article_1b04cf6a-6f2c-11eb-a9b0-63f1582a274e.html?fbclid=IwAR28owYwkD2YfDyecInJOEQSyRmx9h1zmEYJ20v-t2G1qdrgXmGBaLcFxk4