Scenes of biblical devastation, the de in arriving, that is the situation tonight# in North Africa.

At least 5,100 are dead from## immense flooding in Libya.

The mayor one city says# the toll could be as high as 20,000.

And to the## west in Morocco, nearly 3,000 are now officially# counted among the dead from the Friday earthquake.

Ali Rogin reports.

ALI ROGIN: Scenes of horror alon Today, it's a muddy graveyard.

Rescuers say there# are bodies everywhere, in the mangled upturned## cars, beneath the ruins of apartment buildings,# and floating offshore in the Mediterranean.

Yesterday, Libya's prime minister# said the top priority was searching## the open water where thousands are feared missing.

ABDULHAMID AL-DBEIBAH, Libyan Prime Minister# es pecially in retrieving bodies# from the sea.

The Libyan navy,## divers and frogmen are putting all their# efforts into retrieving these bodies ALI ROGIN: The devastation began Sunday, with# torrential rain brought on by Mediterranean## Storm Daniel.

But the worst hit Derna when# two dams in the nearby valleys collapsed,## sending a torrent of water# directly through the city's center.

Satellite images show its sheer force as# it washed away entire neighborhoods in its## path.

Some survivors described a wall# of water reaching heights of 25 feet.

AJI DEISI, Flood Survivor (through# translator): I live on the top## floor of this building.

I opened the# window and saw the storm attacking us Cars were thrown around and families started# running.

The water reached the second floor.

ALI ROGIN: Some medical facilities are# barely intact.

Roads of corpses lay in the## streets as overwhelmed hospitals began the# agonizing process of identifying the dead.

MOHAMAD AL-QABISI, Hospital Manager# (through translator): We counted them## as they were lying in the hallways.# Whoever is ide friends is then buried.

There are# some who have not been identified,## so we started photographing them and assigning# numbers to them, the Things are very bad.

The hospital is dilapidated.

BASHIR BEN AMER, International Rescue# Committee: They are mentally and completely devastated.

I mean, they have# lost their houses.

T lost their workplaces.

They have lost everything.

ALI ROGIN: Bashir Ben Amer is coordinating# needs assessment on th Libya's capital city.

His organization,# the International Rescue Committee,## is one of the few that already had# operations near the disaster zone in Derna.

BASHIR BEN AMER: We have heard stories# from people who were trying to call each## other in the same house while the floods# were taking place to the second floor.## And some people were over the# cabinet and trying to call the## other parts just to see if they're still# breathing or able to respond or answer.

ALI ROGIN: The human toll is# becoming more dire by the hour.## As recovery efforts continue, the# death count is expected to rise,## and the U.N.'s migration agency said some 30,000# people in Derna alone are now Bu t the floods have caused# extensive damage to Libya's## coastal access roads and shutdown communication.

BASHIR BEN AMER: The telecommunication# infrastructure, is lost right now.

It is very challenging also## for the rescue-and-search teams# to communicate with each other.

ALI ROGIN: Meanwhile, in Africa's# northwest, Morocco is st from last week's catastrophic earthquake.# But help is finally starting to arrive Crews bulldozed through the rubble and# brought much-needed aid to survivors,## many of whom have lived in# makeshift tents for days.

Some took refuge in whatever shelter they could,## like this damaged school# building, as they waited for help EHOULINE ERKOUCH, Earthquake Survivor# (through translator): We h nowhere good to sleep.

It's not just# about the collapsed houses.

A house can## be rebuilt later, but I lost my normal# life.

Everything from our life is gone.

ALI ROGIN: Many of the delays were physical.# Remote areas were cut off due to landslides,## but some of them were frustratingly# political.

Morocco's government## continues to refuse any assistance from# countries like the U.S. and France.

Back in Libya, aid has poured in from# neighboring Egypt, Algeria and Tunisia,## as well as Turkey, Italy and the# United Arab Emirates.

Amer says## he hopes the joint international effort will# get people what they need when they need it.

BASHIR BEN AMER: Before this disaster,# already there has been 800,000## people who are identified as need for humanitarian# assistance.

And now, following this tragedy,## I'm afraid that this number will increase# very quickly in a very short time.

ALI ROGIN: For "PBS NewsHour," I'm Ali Rogin.