Nationwide, First Street found more than twice as many Americans live in dangerous flood-prone areas than FEMA's maps suggest, leaving many homeowners and even local officials unaware of the risk.

Key questions remain unanswered about the actions Texas officials took both before and during the catastrophic July Fourth holiday floods as a painstaking search for victims continues along the Guadal...

His radio was alive with more distress than he’d ever heard—reports of people stuck in trees and hanging onto roofs.