I live in a "high desert" region, in the mountains in northern Utah. Years ago I built a really nifty semi-passive cooling system for my house, which relies on the fact that even though the days get quite hot in the summer (~100F), as soon as the sun goes down the temperature drops, generally down to the low 60s, sometimes the low 50s or even 40s. Or at least it used to.
When I had to replace my HVAC system 10 years ago, I had the installers add an extra 8-inch vent pipe to the roof that comes down into the HVAC room and connects into the air return. Into this pipe I inserted an inline electrically-controlled baffle. I also installed a high-volume fan, the type used in greenhouses for plant ventilation, in the ceiling of my laundry room. It pushes air from the house into the attic, creating negative pressure in the house. When I open the baffle on the roof vent and turn on the HVAC fan and the attic fan, the effect is to draw air from the roof (from outside) and to push it through the HVAC system to my entire house, and to draw hot air near the ceiling and push it up into the attic (which is well-ventilated to the outdoors).
I then designed and built a set of ESP32-based microcontrollers, one each to control the vent baffle, the attic fan and a thermocouple that is installed in the roof vent, near the top, and I wrote some software that runs on an RPi and talks to the microcontrollers (via Wifi) and my smart thermostat (via its API). During summer nights, whenever the exterior temperature falls below the interior temperature and the weather forecast says the next day will be over 70F, the RPi turns on the fans and opens the baffle, drawing cool air into the house all night long.
In past years, most mornings I woke up to a house temperature in the mid-60s, and not just the air temperature; most of the house's thermal mass, especially that large amount of ceramic tile on the floors, had cooled to that level. Outside temperatures typically reach 80F by 10 AM, 90F by noon and 100F by midafternoon, but when the house starts at 65F in the morning, it typically takes until 4PM to reach 75F, at which point the AC has to begin working to maintain that temperature. The AC has to work a bit (not much) until maybe 9 PM when the exterior temperature falls. So vast majority of my summer cooling is done by running a couple of fans at night. If we were willing to accept 80F in the house, the AC might often not be needed at all.
Not this year.
This year, nighttime temperatures rarely fall below 70F. My system rarely kicks the fans on until about 4 AM, and even then there isn't much cooling going on because the temperature differential isn't large enough... and even when the house does cool a bit, it only cools the air. It's not cold enough long enough to significantly cool the tile and other thermal mass components. My AC sometimes runs during the night, consistently starts running by 10 AM and runs off and on all day, every day. I've adjusted the thermostat to 78F and I'm considering going to 80F, though I probably won't because my wife would complain.
Also, half of my state is on fire. Last night I disabled the system because there's a 15,000-acre wildfire 10 miles from my house, and if the system ran it would have pumped smoke into the house.
Of course, all of this is ultimately only an inconvenience to me. I can afford to run the AC all day every day if I have to. Not cooling down at night is a real problem for those who don't have the resources I do.