How to judge a budget hotel's safety standards?

I will be staying at a budget hotel in southeast asia soon, I'd like to know how I can find out either beforehand or when I arrive if the hotel's safety standards are good, i.e. what to look for when 'inspecting' the hotel.

Having watched many Hotel Impossible episodes, I know that many budget hotels neglect guest safety either through deliberate negligence or incompetence. I'm especially concerned because safety standards in southeast asian countries are poorer in general (maybe except for singapore).

I'd like to judge the safety in case of a fire (like how to tell if the curtain in the room is fire-retardant or not), natural disasters, and general security against criminals.