We had this freak "derecho" storm and was without power for 9 days (that's how long my Briggs L head 5K ran). It was hot! Started out with fans (we have natural gas so we had hot water for showers etc.) but when it was 90 in house at night you just couldn't sleep! House has sub panel for generator. So I could run lights, receptacles, fridge, freezer, TV etc. but couldn't start central air. I got two 5K BTU window units and ran those in bedooms so you could go cool off.
I did a propane conversion to it so next time I could run it off natural gas instead of putting up with crazies at gas station (it got pretty ugly ... couldn't use credit/debit cards because all the satellite dishes got blown out of alignment)
I plan to have 20K gen at new house so I can run everything off it.