it depends on what kind of burn. A minor burn you need to stop the burning, because even after the hot object is taken away it continues to burn. So the best thing to do is to have ice water made for you while they are doing that run your hand under cold water
Airway, Breathing, Circulation, Conciousness level.
According to FEMA it says first in the reading that you can immediately help the victim do to the fact that the amount of radition that will be released will on affect you directly. After this statment is then says to notify authorities, so with that being said the answer would be Without delay out of concern for radiological hazards
Airway
If the first responders are medical personnel there to assist a victim, they are not concerned with the physical evidence at the scene. They should vacate the scene as soon as medical assistance is completed.
do first aid
The first consideration if there are multiple victims should be the extent of any injuries and which victim needs attention the quickest - it usually isn't the one making the most noise! If there is only one victim to rescue then the first consideration should be your safety. Do not approach the victim until you have assessed whether they are a risk to you
No.
If I am not mistaken, first you should clear there air passage, then CPR.
Secondary event such as an explosion
The first thing you should do for a chlorine gas victim is to remove him or her from where the chlorine gas is. Giving the patient first aid for inhaled chlorine does no good if the guy is still lying there breathing chlorine.
Protecting yourself with proper PPE
If a patient refuses first aid treatment, you should be bluntly honest with them and explain the outcome if they do not seek medical attention. You should be polite but be honest.