Although malfunctioning furnaces and other gas-powered appliances can also lead to carbon monoxide poisonings, no consumer product studied by the CPSC has caused more CO deaths than portable generators.
https://www.nbcnews.com/news/us-news/generators-carbon-monoxide-poisoning-rcna9027
According to that story, a portable generator "can emit as much carbon monoxide as 450 cars, according to federal figures."
@Sr0bi
Which is why I have a gas generator that I have never used. I have enough battery packs to last up to five days without power.
@Sr0bi @Bix Got the last portable AC at Lowes after Beryl (couple days of no power). Enough for our bedroom.
A window unit won't work because windows are vertical. As it was the opening was too tall and we used cardboard and duct tape to improvise.
No casement window AC at Lowes. I could order one but now have the portable.
Side note: I have casement windows where I made brackets to accommodate a standard window AC. But it's not something easily done at the last minute.
@Sr0bi @Bix What does that look like? We have a large fixed pane in the middle with sliding windows on either side. I don't think they open wide enough for a even as small standard window unit. But the windows are over five feet high as well. So there would be a large opening to fill somehow, too.
Damned open floor plan limits my options for other rooms.
@S_r_stone @Bix
Mine have just one moving pane that's open to 28" wide. Then I put a horizontal metal bar above the AC for support. The space on top could eventually be plexi-glass but right now has an opaque filler panel. I have also used a floor AC with a duct. They're flexible in terms of the window style they work with and don't take a lot of floor space but they do use some inside air unless you get the kind with twin ducts.
NG pressure in extreme cold can be an issue but in the TX storm, vast numbers of furnaces were idle. So I had no problem with enough natural gas to run my furnace using the genset to power the blower motor.
@S_r_stone @Bix
This is where it pays to have a window AC or two. That way you don't need the generator to power the entire house.