When our AC goes out, we run fans.
Unless all of the electricity goes out.
Actually we have bought 2 of those outside yard gizmo's to just shade an area and bolted them to the deck. Expensive as heck, one was destroyed in a wind storm and the other one we replaced it with needs hubby to go out after it rains with a broom stick to poke areas full of water so it will drain.
Other then that it works well, cools off the house by 20 degrees but next year we will have to find something better. The uncovered deck floor gets so hot the dogs will not walk on it, nor will I bare foot.
I would think had we as I suggested just originally bought some 2x4's and built an overhang on to the deck and covered with those plastic tinted sheets of some kind of plex a glass the cost would not have cost much more then the first gizmo we bought. For tax purposes nothing can be attached to the home permentally.
First time I saw these things was in California in the late 1960's It took a while for the manufactures to devise the panels to withstand snow and ice in the north but today they work quite well.
Apartments are a challenge, how to keep heat in in the winter and the heat out in the summer. Only thing I can think of is to double curtain the windows. Hang a rod 4-5 inches from the window and another one 4-5 inches from that. Put up 2 sets of curtains both insulated. The air pockets between them will help to cool or keep heat in per season.
Ceiling fans help we installed them in last 2 apartments and left them when we moved, management gave us no crap about them.---Never asked permission as we knew they would have said NO so we put them up anyway and still got our deposit back.
We have just one cheapo air conditioner in the bedroom window, gets hot we stay in there. Close up the rest of the house, I put shower curtain liners in a color to match the curtains behind them, close all doors and windows and take 2-3 hot showers a day. When you take a hot shower when you get out the air is cooler then the hot steam and wow-- for a few minutes at least you feel cool.