It says (not sure where) that Hashem makes thunder and lightening so that our hearts should wake up to teshuva.
It’s impossible to know precisely what Hashem’s trying to say. But as Rabbi Wallerstein said after the tragedy with Leiby a”h, “There’s no way I should know what Hashem wants from you. YOU should know that. You should know what’s most difficult for you and what YOU are supposed to work on.” Be it the internet, listening to secular music, movies, tv, loshon hara, tznius…the list is endless!