​The University of Arizona’s number one publication provides the following information on scorpions:

Scorpions are difficult to control with insecticides alone. Therefore, the first control strategy is to modify the area surrounding a house.

• Remove all trash, logs, boards, stones, bricks and other objects from around the home.
• Keep grass closely mowed near the home. Prune bushes and overhanging tree branches away from the house. Tree branches can provide a path to the roof for scorpions.
• Store garbage containers in a frame that allows them to rest above ground level.
• Never bring firewood inside the house unless it is placed directly on the fire.
• Install weather-stripping around loose fitting doors and windows.
• Plug weep holes in brick veneer homes with steel wool, pieces of nylon scouring pad or small squares of screen wire.
• Caulk around roof eaves, pipes and any other cracks into the home.
• Keep window screens in good repair. Make sure they fit tightly in the window frame.