One sunray and we are in trouble.
I found my guitar with the bridge unglued because at 10am in the morning a pervert sunray entered through a window in an odd degree and sitted for the hour just on the belly of the case where the bridge is.
So a couple of days in that exact spot and when I went to use it, bridge was gone.
And I use hide glue for everything. It's waaay better for sound and lightness so also it is more sensitive to heat than anything else.