Israel has said it would to allow Palestinians crammed into southern Gaza to leave before its planned invasion of Rafah, but experts have warned it was practically impossible to get those civilians out of harm’s way. The roughly 1.5 million Gazans in the territory’s southernmost tip have the Mediterranean Sea to their west and sealed borders to the south and east, while Israeli forces are poised to push in from the north. “Where will we go if they enter Rafah, and where will we get a tent, mattress and blankets?” said Sabah al-Astal, 50, already displaced inside Gaza by Israel’s military onsla…