Is it permissible for a woman observing the 'iddah (waiting period) after her husband's death to travel outside the country due to the danger of the ongoing war in Syria?

It is permissible for a woman in her 'iddah (waiting period due to the death of her husband) to travel outside her country for a necessary excuse, such as fear for her life or property, while observing the rulings of mourning. This is because necessities permit the otherwise forbidden. She is not required to observe her 'iddah in a specific place as long as it is safe, and she may move to any location due to the waiver of the obligation for an excuse.