Пример употребления: A government can declare a state of emergency during a time of natural or man-made disaster, during a period of civil unrest, or following a declaration of war or situation of international/internal armed conflict. (Wikipedia).
In fact, Egypt's last month-long state of emergency was declared just last January, when since-ousted President Mohamed Morsi declared a curfew and gave police the power to arrest and detain at will in the cities of Port Said, Suez and Ismailia. (The Washington Post).
For the second time in three weeks, the Governor has declared a “state of emergency” due to winter storms. (Atlanta Injury Law Blog).