Just a stone's throw from two of Los Angeles' busiest freeways lies the Sepulveda Basin Wildlife Reserve, a unique spot in an urban jungle.
The northern portion of the reserve is adorned with 30-foot-tall cottonwood trees, spots of coyote bush and other plants. Native plants cover 50 percent of the nature spot, says Kris Ohlenkamp with the San Fernando Valley Audubon Society.
"On the other side it was significantly more than that," he says.
There's a quick, one-word explanation for why the federal government started selling flood insurance: Betsy.
Hurricane Betsy, which struck the Gulf Coast in 1965, became known as billion-dollar Betsy. Homes were ruined. Water up to the roofs. People paddling around streets in boats. Massive damage.
This would be the time when you'd expect people to be pulling out their flood insurance policies. But flood insurance was hard to come by. You could get fire insurance, theft insurance, car insurance, life insurance. Not flood.
Superstorm Sandy got officials in New York and New Jersey talking about how to prevent flooding in a time of global warming and sea level rise.
But the place on the East Coast that's most vulnerable to flooding is several hundred miles south, around Norfolk, Va. — and Norfolk has already spent many years studying how to survive the rising waters.
Scientists say what Norfolk has learned is especially important in light of new research showing that the coastline from North Carolina to Boston will experience even more sea level rise than other areas.