... Who knows or can be assumed to know all the processes of nature? But if it would be wrong that a man should be held liable for damage unpredictable by a reasonable man because it was "direct" or "natural," equally it would be wrong that he should escape liability, however "indirect" the damage, if he foresaw or could reasonably foresee the intervening events which led to its being done.
...  It is unjust to hold someone liable for unpredictable harm caused by nature, but it's also unfair to absolve them of responsibility if they knew or could have foreseen the chain of events that led to the damage.