So, I noticed that environmental traps tend to cause unrealistically and impractically big chain reactions.
Some examples:
I shot a red barrel in Saltholmen Naval Base and two cars exploded in a parking lot across the street.
In Dyvik I shot a power box next to the barn and the entire driveway went up in flames
Similar situation in Överbytorp, where, once again, if you shoot the power box next to the barn, almost every car and fuse box in the area explodes.
And there are probably many more such locations.
I could imagine that this is on purpose, probably for balancing reasons, because it means that there are less individual explosives/emps available and they are more dangerous to use, but if this isn‘t the case, I personally think that those chain reactions are a bit too much.