You might try installing lightning rods on the roof of your house. The lightning will hit the rods and become grounded.

I have never been afraid of thunder and lightning storms.I often stand in awe of Gods creation. When I was younger, my dad had a ham radio station set up in the house. He built a antenna that extended at least 75ft from the house. One day there was a lightning storm, and the lightning hit the antenna and traveled right to the house. It damaged some of his Ham radio equipment. Luckily nobody was hurt. It did give me a appreciation for lightning storms.

Sorry I'm not much help for your problem.I hope you can find a way to deal with your phobia and fears.