Evey site has its resident moron troll. You matter how many times you refute them, they just dig themselves into bigger holes.
So... a city is flooded.
The husband and wife are at work.
Their three kids are at school and get separated.
Each go to disaster recovery centers and each report everybody in their family, of course, is missing because they don’t know where the other members are.
The disaster recovery centers report individual totals and this single family of five results in reporting that TWENTY people are missing...
THIS is why initial missing person reports are often highly exagerated numbers.