From a Washington Post story by Miriam Berger and Louisa Loveluck headlined “Israel orders million Gazans to evacuate; U.N. says that’s impossible”:

JERUSALEM — Israel’s military ordered the evacuation Friday of more than 1 million Palestinians from the northern Gaza Strip, a move that the United Nations described as potentially “calamitous” amid heavy airstrikes and a rapidly declining humanitarian situation.

Israel has indicated that it is readying a ground invasion of the besieged enclave, a move aimed at ending the rule of Hamas, the militant group that controls the area and which launched an unprecedented attack on Israel on Saturday, killing more than 1,300 civilians and soldiers, and trucking scores of hostages into Gaza.