***Be fair...the Mayor did tell the people to bring their own food and water. ...for three days!***
If you happen to be frail old lady, or a man on crutches, or a child, the only amount of water you could carry would be a half gallon, at MOST. That's only eight glasses. And you do need some for washing your hands, etc. besides drinking lots of it in the outrageous heat.
My post was sarcasm.