(an instance of) bad luck, trouble

bad luck, situation

a sudden event causing great suffering and destruction e.g. a flood

calamity; unhappy conclusion

(an instance of) bad luck

unpredictable outcome

(an instance of) bad luck (which is more usual)

disaster

(an example of) a form of drama in which there is conflict and suffering and a sad ending; (an instance of) a very sad event, experience etc in real life

disaster