More than 630,000 people have fled Rafah since May 6 amid widening operations by Israel’s military, with many seeking refuge in Al-Mawasi and Deir al-Balah -- areas overcrowded with "dire conditions" -- according to the United Nations.

-ABC News' Emma Ogao

Humanitarian assistance shipments delivered to Gaza through the U.S.’ maritime corridor should not replace aid coming into the enclave through land crossings where "barely 100 trucks of aid a day" entered over the last two weeks -- about a sixth of the level needed to stave off famine -- USAID Administrator Samantha Power said in a statement Friday.

"Every moment that a crossing is not open, that trucks are not moving, or where aid cannot safely be distributed, increases the terrible human costs of this conflict," Power said.

Supplies coming into Gaza through the temporary pier Friday include contributions from the U.S., United Arab Emirates and the United Kingdom.

But, the statement doesn’t say how much aid is now being moved through the corridor at this point or how much of it is sitting in Cyprus waiting to be shipped -- so it’s still unclear if and when these deliveries might have a substantial impact.

-ABC News' Shannon Crawford and Anne Flaherty

Almost 1,400 buildings have likely been damaged or destroyed in Rafah, Gaza, since May 4, according to an analysis of satellite imagery by two university researchers.

Data from the radar-enabled Copernicus Sentinel-1 satellite operated by the European Space Agency was used to analyze the effects of fighting on the terrain and buildings of Gaza, according to Corey Scher, of the CUNY Graduate Center, and Jamon Van Den Hoek, of Oregon State University.

Between May 4 and May 8, the researchers found evidence that 895 buildings were likely damaged or destroyed in Rafah. From May 8 to May 16 they counted 487.

Since Oct. 5, the researchers have found evidence of likely damage or destruction to 18,176 of the 48,678 buildings in Rafah.

-ABC News' Chris Looft

The bodies of three hostages have been recovered, according to the Israel Defense Forces. The bodies of Shani Louk, 23, Yitzhak Gelanter, 57, and Amit Buskila, 28, were recovered in an operation by the Shin Bet, Israel's security agency.

The hostages had escaped from the Nova Music Festival and were killed in the area of ​​Kibbutz Mefalsim and their bodies were taken to Gaza, according to the IDF. Louk's capture generated international headlines after video emerged of her lifeless body in the back of a truck with Hamas terrorists.

"Our hearts go out to them, to the families, at this difficult time and we will leave no stone unturned, we will do everything in our power to find our hostages and bring them home," Rear Adm. Daniel Hagari, spokesperson for the IDF, said. "We will not rest until we do."

The State Department on Monday said it was aware of reports that U.S. doctors were trapped in Gaza, and that it's been working with Israel to reopen the Rafah gate so U.S. citizens and other foreign nationals can leave.

"I can say that we're aware of these reports of U.S. citizen doctors and medical professionals currently unable to leave Gaza," principal deputy spokesman Vedant Patel said. "As I said before, we don't control this border crossing. And this is a incredibly complex situation that has very serious implications for the safety and security of U.S. citizens. But we're continuing to work around the clock with the government of Israel, with the government of Egypt, to work on this issue."

He added, "Rafah is a conduit for the safe departure of foreign nationals, which is why we continue to want to see it get opened as swiftly as possible."

The State Department said it does not have an estimate of Americans still trapped in Gaza, but that it's helped 1,800 U.S. citizens and legal permanent residents to depart Gaza so far.

"Unfortunately, this is not a border crossing the United States controls but we are continuing to work around the clock with the government of Israel, with the government of Egypt on whatever we can do to make sure that Rafah gets open. … We need to see Rafah open as soon as possible," Patel said.

-ABC News' Anne Flaherty