stress won't cause fear :)
am i under too much stress thats why i afraid of thunder?
Are you only scared of it when you are alone? If you notice you're less afraid of thunder while you're around people, it's most likely because you know if anything were to go wrong, there would be others around to help. There really is no reason to be afraid of thunder. It's simply areas of hot and cold air clashing together during a storm. It cannot do you any harm.