Atlanta -- The U.S. Geological Survey says the September flooding that inundated the Atlanta area was so extreme, scientists say the data are stunning.
"At some sites, the annual chance of a flood of this magnitude was so significantly less than 1 in 500 that, given the relatively short length of stream-gauging records, the U.S. Geological Survey cannot accurately characterize the probability due to its extreme rarity," said Robert Holmes, USGS National Flood Program Coordinator.
