It's not a lot of fun getting out when it's hot, but it can pay off. Hogs can't sweat to cool off. They will go to water to keep cool. When water is limited it can concentrate the pork. Get down wind from the water holes and slip up to them. Pay special attention to creeks with holes and under cut banks that hold water. The big holes left by wind thrown oaks are a good place to look too. Even if there is no water in them, it gives the hogs access to deeper, cooler soil to root into. Me and my buds have killed a lot of pigs this way , just pay attention to your body, and drink water constantly. I like to stuff my camel back with as much ice as it can hold and then fill with water. It helps keep me cool laying against the small if my back.