No fan of the heat?

The heat of the summer always makes persons think of trying to stay cooler.
Roof fans are a common way to help keep homes cooler (and lower a/c costs).
(Attic fan background info)
To add or repair a fan means working in the attic, so it has to be done in the morning when it's cooler.
By the way, the roof and attic get hot from the sun.   An overcast 95 degree day may not trigger the roof fan's thermostat (usually set for 110 degrees).  But a clear, sunny 80 degree day can result in a hot attic and the fan will turn on.