Ghostrider, on 9 Sep 2009, 12:41, said:
It's hard to mourn for someone you don't know, as you never establish a connection to that person. Therefore it doesn't make a difference in your life if they die or not.
The reason it's worse than most deaths is that the majority of people die from old age, sickness, etc. while these people taken by the flood died before their time.
To add to your last statement, it's the number of people that were killed in that instant, be it 20 or 200. Gabriel's statistic, while it varies, is likely that it's 86,400 spread around the world and it's likely only one person in a specific area. Therefore the one's to care are those who were family or friends to that person.
Dying of sickness or other non-natural causes can be considered "before one's own time", particularly if that person be an infant or "young" (those in their 60's and 70's are still young).