I can tell you from my different type of experience, that yes, this type of situation makes one's stress level increase greatly...When my house burned down 3 yrs. ago in the middle of the night, I was able to safely remove all humans, and 4 dogs before the fire department got there, but my 3 cats went into hiding with all of the hysteria, and I could not locate them, and when the fire dept. arrived, I was still in the house full of smoke, with flames coming down from the attic, looking for them, and was quickly removed from the house by the firefighters. I was in hysterics, yelling at them that my cats were still in there, and that I had to get back in to find them. So as I stand in the street watching, the firemen soon came to me to tell me that all 3 cats were located under my sons bed, and safe as the fire didn't hit that room yet, and eventually brought each one of them to me... There are NO words to describe the horrible feelings that I had during the time of not knowing if they were safe, even as I watched my home and most everything inside gone, I only wanted my cats...I can only imagine that everyone affected by Katrina and such, felt some of the same feelings I had, except many of them, never knew what happened to their pets.
So, added emotional stress? That is a HUGE yes.
I hope this will help for your paper, and good luck.