Regarding the lighting strikes topic... my understanding is that the 7D2D world is a post-apocalyptic world, and in that regard extreme weather events could perfectly fit the theme. My idea is to have for each biome ONE rare extreme event.
Example:
- Forest : lightning storm
- Burnt : ember / cinder "rain"
- Desert : dust storm
- Wasteland : radioactive wind
Regarding specifically lighting I'm envisioning something similar to that old Mad Max game from a few years back.
As you can see in this video, most of the negative effect for the player is some damage and very low visibility.
In 7D2D
@faatal could program the game (i.e.) to ALWAYS miss the player, but not by much! Meaning that a lighting would sometimes strike a few blocks away from the player and only hurt him/her by X% of the health. That way the storm would be a meaningful threat but you'd still have the option to quickly heal or run for cover.