I’m aware of those incidents. So exactly when will you be rubbing your chin saying “hmmm” instead of proclaiming nothing to see here folks? And exactly when will you be satisfied that they have exceeded the statistical noise?
When they become more frequent than normal. I work near the Houston ship channel. I work in the oil/gas/petrochem industry.
This may seem an unusual rate to you. May I politely suggest that is due more to the your past awareness, than any change in rate of explosions.