>>211760067Open the lowest north facing window and put a fan pulling air in, open the highest south facing window and put a box fan in there blowing air out.
Its going to create airflow through the house where the coolest air is pulled in and the hottest air is pushed out.
You can also make a DIY swamp cooler, assuming its not humid.
Get a fan, and a big tray full of water, and wave the fan blow across the surface. It has to burn thermal energy to pick up the water, which cools it. Put some ice, salt, and a little isopropyl alcohol in the pan if you want it to cool down faster, but if you do this you might have a problem with the ice melting and overflowing the pan.