Some scene of tragedy events could get upsetting, frightening, intense, and emotional to some viewers especially for those who witless it.
The show does feature a number of people (including children) in frightening, dangerous situations. However the stories generally have "happy endings" and most victims are able to recover and move on with their lives.
Occasionally a story will end in tragedy and a person or persons will pass away (these episodes are not common but do exist., the majority of the episodes end positively.)