According to officials, approximately 10,000 Philadelphia residents are living in flood zones. “We’ve done a lot of serious damage to our systems,” notes Jeff Featherstone, a city planning professor at Temple University’s Ambler campus. In part 1 of the KYW Regional Affairs Council series, “Stormproofing the Delaware Valley,” he says mistakes were made more than 50 years ago by developers in the region. “We didn’t pay any attention to our creeks,” he said.  “And now we are paying the price for that.”