We’re getting better at figuring out whether something like this month’s deluge in Louisiana was influenced by climate change. And that’s important, says a climate scientist who’s also an aid worker, to get a better handle on what might be ahead to try to avert more human disasters.We’re getting better at figuring out whether something like this month’s deluge in Louisiana was influenced by climate change. And that’s important, says a climate scientist who’s also an aid worker, to get a better handle on what might be ahead to try to avert more human disasters.