Over the July 4th weekend, deadly flash floods swept through Kerrville, Texas, after a month’s worth of rain fell in just hours, causing the Guadalupe River to rise 26 feet. More than 100 people have died, with many still missing. Among the victims were 13-year-old Blair and 11-year-old Brooke Harber, who were staying with their grandparents, Mike and Charlene, along...