The emergency home treatment of thermal burns has been extensively treated in the relevant section of this website.

Actually there are no standardized guidelines that can illuminate nurses and doctors on how to tackle this type of injury in relation to the time elapsed from the thermal event.
In the light of my twenty years of experience in Italy and abroad, in equipped hospitals and field hospitals, I realized an algorithm of treatment that takes into account not only the degree of depth but also the elapsed time and dressings made previously.
 

Diagram on the treatment of heat burns in a hospital setting