Spanish authorities search flooded underground car park - fearing how many bodies they will find

The story of these floods has been full of grim, unsettling images.

Now there is another one - the Bonaire shopping centre in Aldaia.

Today, it was an awful place. Not because of the immense damage wrought by the floods, but because of the horror that may lie ahead.

The emergency services are pumping out the underground car park that lies beneath this retail complex, one of the biggest in the country, and they don't know what they will find.

There will be bodies - that seems sure. The question is how many. And the fear is that it could be dozens.

You can see the ramps that run down to the car park, and you can also see the water level glistening, not far down the ramp.

Pumping out this entire car park will be a marathon job. Searching it will take patience, specialist equipment and stoicism. There will surely be grim discoveries down there.

Scuba diving teams have been sent in, but we were told that they have been unable to go into the water so far. It is full of debris, oil, diesel, and goodness knows what else.

Today we saw an array of equipment being delivered - boats, pumps, a military ambulance, kayaks and lifting machinery.

An enormous amount of resource is being thrown at this, at a time when so many towns are complaining that they feel forgotten.

Cristina Vano, a judicial expert, is working here as a volunteer, checking the cars strewn around in the ground-level car parks.

Her job is to peer inside and see if she can see a body. If she can't, she puts an X on the side using coloured tape; if she can, she calls the police.

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She is waiting for the first vehicles to be pulled from the Bonaire underground car park, and she is steeled for it to be a horrible experience.

"There is space for 1,700 cars in there," she says.

"We were told it wasn't full, but there were certainly many cars in there. The problem is that a lot of people took refuge there, so we don't know what to expect.

"The police in Aldaia were talking about us finding maybe 80 people - I hope it will be less. It's really sad, but we are expecting a lot."

We speak to the police, who tell us that searching the car park will be a long and complicated process.

They don't want to make any estimates about the number of cars involved, nor the number of people. But someone involved in the operation speaks to us after coming out.

"A lot more than a hundred cars are in there," the person says. "Maybe hundreds."

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There is an army officer, from special services, who tells me that his unit of Green Berets are ready to do anything that is needed. They have been helping to clear out the shopping centre for days now, and will continue. But he knows this is not a quick job.

On the far side, we see a group of firefighters walking slowly away from that cursed ramp that leads down to the car park. Their faces are drawn, an expression that we see a lot during a day observing this recovery mission.

Everyone involved in this knows that there is no chance of finding a survivor in this flooded car park. All they can do is hope that it's not as bad as they fear.