Refugees have continued to crowd into Raqqa, close to the border with Egypt, where around a million and a half people are now seeking safety. We'll get the latest on the ground in just a moment. But first, last November, we reported on the case of a young woman and her disabled brother, Tala and Yazid in Raqqa. They were trying to escape, but were repeatedly turned away at the border, along with their mother and siblings. Our special correspondence, Fergal Keen, has been following the family's story.

We came back to no electricity, no food for today.

She's been a constant, caring voice from within the siege.

And one more day closer to my brother running out of medications, and we're still here.

Tala Abu Nahla's daily life, a relentless struggle to care for her disabled brother, Yazid. Three times, they tried to escape Rafa. Like last November when our cameraman first met them at the border.

We're trying to do anything that we can to survive because I simply don't want to die at 24.

They didn't get out of Gaza then. Back home, amid the constant noise of drones overhead, Thala tried to comfort Yazid. And then, just a few days ago, we had news from Cairo. They'd escaped to the safety of a flat in the Egyptian capital. Thala describes the moment they left.

I can't hear drones anymore. And I can't see. I can't... I'm sorry. I want to be hearing any bombings or any air strikes, and it felt really surreal.

But normality, even being able to boil a kettle for tea, has brought uncomfortable feelings.

This is one of the hardest feelings to talk about. Yes, show me.

Tala carries the memory of the people she's left behind.

Every time I have food to eat, or I don't have to go running for water, or knowing that everything is available, it makes me feel even guilty to think about everyone in Gaza, the 1.2 million people who are displaced and faught right now.

But they had to leave. Yazid's medication had run out, worsening his condition.

He would have a seizure every time he heard a bombing. It got really scary. His body and his mind is not being able to understand everything that's going on.

Tala knows a world beyond Gaza. She studied in the US, lived with an American family. She won a fellowship for young leaders funded by the State Department. But always coming home to Yazid, here together in 2021. Will she return to Gaza?

I don't I don't know how long is it going to take, but I would want to be a part of rebuilding it and healing it. I think everyone who leaves Gaza, Gaza still does not leave them.

The Cairo sky is safe, but it's not the sky of home. Fragil Keen, BBC News, Jerusalem.

Let's go live now to Jerusalem and to our correspondent Paul Adams. Paul, what do we know about conditions in Southern Gaza tonight?

Well, Rita, you mentioned two places in your introduction. One was NASA Hospital. Well, the situation there is very unclear. The Israeli troops have been in there since early Thursday morning, conducting searches, arresting members of staff who they believe are associated with Hamas, and looking for evidence that hostages were being held in the hospital. They say that they are doing what they can to keep the hospital running, bringing in diesel and oxygen, and helping to fix a generator. Palestinian sources are saying that the hospital is absolutely on its last legs. In fact, the head of the WHO has said that effectively, NASA Hospital has ceased to function. We've heard of people dying as a result of interruptions to power and oxygen. So at the very least, it's an extremely precarious situation in NASA Hospital. To the south, a little way to the south, in Rafa, 1.3 million people are waiting to find out when the Israeli military assault will come. And today, a member of Benjamin Netanyahu's war cabinet, Benny Gantz, said that if hostages are not released by the beginning of Ramadan, that is in precisely, then the Israeli military assault on Rafa would begin.

The White House has demanded that that cannot begin unless those civilians are out of the way. At the moment, there is no plan to move them.