Glue for very hot, very humid conditions

I have just recently returned from a mission trip to Pearlington, Mississippi. Its right down in the bayou on the Pearl river . A lot of people still living in little shotgun FEMA houses (the ones without formaldehyde). I met a lady who wants a dreadnought guitar. Very sad story. Lost everything she ever owned. Anyhow I'm probably gonna build her a guitar at the pearlington discount, free. In her present living conditions, she will have little control of heat and humidity. After 3 years, she is in her house but still has no electric. Waiting on bureaucracy.
Anyhow, I was wondering if anyone has a sujestion on what glue to use in such hot and humid areas? I've only used hide glue and titebond original on my guitars and mandolins. David