Off the top of my head...

Those pets have to go somewhere. I would imagine (don't know for sure) once they're rounded up there, they'll be sent all over the country. She could offer to accept a batch or three and find good homes locally. That will be almost as hard as rescuing them in the first place, without traveling to New Orleans and camping out.

Second, there are always fund raisers. Sounds lame, but she could help raise money to support this specific cause.