Almost no protection...
Just keep an eye on the surrounding and "protect" it.
Oh~ Btw, i do have some form of protection..... I bring a rain coat i bought from Zoo when it was raining back then... As its is compact, i.e. covered in a small plastic package i always put it in my camera bag....
Case Study: Vietnam
Went Vietnam then rain.....covered myself and bag and walk back to hotel.... voila bag and camera all dry.. but i am wet partially... (on the exposed part) since then, i made it a point to keep one such rain coat for emergency......
Just my personal experience....