A sweeping new evacuation order by Israel’s military covers much of northern Gaza, warning residents that these areas will soon turn into dangerous combat zones.

Many of the inhabitants have already been displaced at least once during the war that began almost 20 months ago and little humanitarian aid has been reaching the area, where hunger is widespread.

Maps show that only a few neighborhoods in Gaza City, the main population center in the north, were still unaffected by evacuation orders over the past 10 days. The latest order, issued Thursday night, urged residents of northern Gaza to move west toward the Mediterranean coast.

“From this moment on, the mentioned areas will be considered dangerous combat zones,” Avichay Adraee, an Arabic-language spokesman for the Israeli military, said in a statement on social media late Thursday. He said residents of northern Gaza had been warned several times to leave.

Northern Gaza is home to hundreds of thousands of Palestinians. But most humanitarian aid has not been reaching the area for months.