Israel is drawing up contingency plans to evacuate up to a quarter-million civilians from border communities to protect them from attacks from Hamas, Hezbollah or other Islamic militant groups.
The mass evacuations would be the biggest in Israel's history, part of a bigger plan where the army works with municipalities to keep civilians safe.
All sides have been preparing in case a new round of warfare breaks out, although Hezbollah, an Iranian-backed group sworn to Israel's destruction, currently is tied down in Syria's civil war fighting in support of President Bashar Assad.
In 2014, 50 days of fighting between Israel and Gaza's Islamic militant Hamas rulers killed an estimated 2,100 Palestinians, six Israeli civilians and 66 Israeli soldiers.
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There was widespread devastation in Gaza and thousands of rockets and mortars fired by Hamas and other Islamic militants at Israeli towns and cities.
"In 2017, all of Israel is under threat," said Col. Itzik Bar of the military's Homefront Command. Preparations are underway for Israel to deal with "very high amounts" of incoming fire, he said.
Bar pointed out that Hezbollah has gained battle experience from fighting alongside Assad's forces and that Hassan Nasrallah, the Shiite group's chief, has recently increased his rhetoric about attacking Israel.
The evacuation plan would apply mainly to communities adjacent to the borders, he said.
"In places where we understand there is a great danger to civilians, for example, where we won't be able to supply defenses or supply deterrence ... We will evacuate," Bar said.
Evacuees would be housed in existing infrastructure, including hotels, schools and Kibbutz guest houses, he said.