Death by drowning or by burning or by crushing

Look at those who die by drowning, or by fire, or who are crushed by falling walls. Are these not frightening things? 

But that does not indicate that they are bad, rather the Messenger of Allaah (peace and blessings of Allaah be upon him) called them martyrs (shuhada’), which is the utmost honour. The way in which a person dies does not indicate that he is bad, but Allaah in His wisdom decrees that some people should die in this manner. Perhaps that is in order to raise them in status in Paradise, or to expiate for some of their sins, or for some other reason that we do not know.