I got a kiddie pool to place under our tree for those hot summer days that DH and I would be gone all day. I used to take her on walks in the mornings but that was before my work hours changed and I wouldd have to walk the dog in the dark (not a good idea for a pregnant woman!)so I'm not walking her in the mornings anymore. I am going to hit the park in the evenings when it's cooler and on super-hot days that the dog needs a good long walk, I just drive a bit further to hit the wooded trails so Abbey can stay cool.
If we're going to be gone for several hours or less, we'd just leave her inside where it's cool.
Abbey: 10 years old German Shepherd
Suki: 10 years old Calico kitty