Spain hit by deadliest floods in decades. Here’s what we know

(CNN) — Spain is reeling from its worst flooding in decades, after a year’s worth of rain fell in just hours this week in the country’s southern and eastern regions.

The storm began on Tuesday and has so far killed at least 205 people, including 202 killed in the worst-hit Valencia region, emergency services in the region said Friday, while dozens more remain missing.

The storm flooded towns and roads, caused rivers to burst their banks, and left thousands without power or running water.

“There are dozens of missing people. We cannot confirm that number. But it is clear that as more days pass and they do not appear, the more likely it is that we will have no hope of finding them alive,” Torres added.

Valencia saw its heaviest rainfall in 28 years with people caught off guard and trapped in basements and lower floors of buildings.

Emergency workers are still fighting to rescue those who are trapped, with operations underway to recover bodies and clear debris. Authorities warned Friday that roads have collapsed in some areas, with emergency services unable to get access.

Here’s what we know.

Where is the worst damage?

Spain’s eastern and southern regions often see autumn rain, but this year’s downpour was unprecedented. Most of the deaths occurred in Valencia, which is located along the Mediterranean coast and is home to more than 5 million people.

The flash flooding in the region, a tourist hotspot during summer months, saw rural villages submerged in water and rendered main highways unusable on Tuesday night and into Wednesday.

A courthouse was turned into a temporary morgue in the region’s capital, the city of Valencia.

At least 40 people, six of whom were in a retirement home, died in the town of Paiporta in Valencia, Spanish news agency EFE reported, citing its mayor.

Trains have been suspended in Valencia, as have other major public services in other affected regions.

In Utiel, one of the worst-affected towns of the Valencia region, the suffering is palpable.

“My father is going to be 100 years old now and he doesn’t remember a flood like that. It was terrifying to be here,” José Platero, a 69-year-old resident, told CNN. “We found him looking for personal belongings near his home.”

On Utiel’s Avenida del Milagro, residents have been working together to remove muddy water from their homes, using brooms to help sweep out the mess covering their bedrooms and kitchens.

“I started by putting towels on the door so that the water wouldn’t get in. But suddenly the garage door burst open,” Carmen told CNN. “The scene was terrifying, as the mixture of water and mud began to occupy the kitchen with so much force, it knocked down the refrigerator.”

“This has never been seen here,” adds Ángel, another resident. He showed CNN the state of his flooded home. “My finances are in tatters. If the insurance company doesn’t compensate us now, if they don’t take responsibility for the damage, we’re going to be in a very bad situation.”

Flooding was also reported in and around the cities of Murcia and Malaga with more than 100 mm (4 inches) of rain falling in some areas.

Speaking to CNN, one traumatized survivor said the flooding made him feel “powerless.”

“In half an hour, we lost almost everything… My wife had to carry my daughter in her arms when the water was almost chest-high to escape to a hotel.”

In Valencia’s La Torre neighborhood, where the water rose to chest level, volunteers were out on the streets Thursday attempting to clean up.

Rescue teams in La Torre discovered the bodies of seven people in a garage on Thursday, according to national broadcaster TVE, citing police.

Some of the local residents voiced their frustrations to a CNN team on the ground, saying that they did not receive a government alert warning that there would be a flood or even possibility of a flood until it was already happening.

What has the response been?

Five hundred Spanish soldiers have joined the operations in the Valencia region, bringing the total deployed across the country to 1,700, the Ministry of Defense said Friday. Some areas can only be reached by helicopter.

Valencia’s regional leader Carlos Mazon told reporters early Wednesday that bodies were found as rescue teams began to reach areas previously cut off by the floods. As of Thursday morning, emergency services said they had reached all the affected areas.

The Spanish government sent emergency alerts on Tuesday asking people to stay indoors or seek high ground. Extreme rain warnings were put in place for some areas including around Valencia, according to Spain’s Meteorological Agency, AEMET. These warnings called for the potential of 200 mm (8 inches) of rain in less than 12 hours.

In some locations, the rainfall estimates were exceeded in even shorter periods of time. Chiva, which is east of Valencia, received 320 mm of rain in just over four hours, according to the European Severe Weather Database. The Valencia area averages 77 mm (3 inches) for the entire month of October.

However, many people were caught off guard, leaving it too late for them to seek safety. Some took to social media to vent their frustrations, claiming that they received the emergency alert in the midst of the storm.

Hannah Cloke, a professor of hydrology at the UK’s University of Reading, said the high death toll suggests Spain’s regional emergency alerts system failed.

“It is appalling to see so many people dying in floods in Europe, when yet again weather forecasters had predicted extreme rainfall and issued warnings. The tragedy of people dying in cars and being swept away in streets is entirely avoidable if people can be kept away from rising flood water,” Cloke told CNN.

“This suggests the system for alerting people to the dangers of floods in Valencia has failed, with fatal consequences. It is clear that people just don’t know what to do when faced with a flood, or when they hear warnings.”

Spain’s Prime Minister Pedro Sanchez offered support, pledging his government would do all it could to help flood victims, as he urged people to remain vigilant.

The Spanish government has also decreed three days of official mourning, starting on Thursday.

Extreme weather warnings continue for portions of eastern and southern Spain, according to AEMET, with more rain expected.

Authorities issued a red warning overnight for the Huelva coast, in Andalusia, which had 140mm (5.5 inches) of precipitation in just 12 hours and continues to see intense rainfall on Friday. Orange and yellow alerts also remain in place in isolated parts of Valencia.

What caused the disaster?

The torrential rain was likely caused by what Spanish meteorologists call a “gota fría,” or cold drop, which refers to a pool of cooler air high in the atmosphere that can separate from the jet stream, causing it to move slowly and often lead to high-impact rainfall. This phenomenon is most common in autumn.

Climate change is the “most likely explanation” for the intensity of the downpours, according to a preliminary rapid analysis by scientists from the World Weather Attribution initiative. They found global warming, driven by fossil fuel pollution, made the torrential rainfall that hit Spain about 12% heavier and twice as likely.

“We are loading the dice of extreme weather in the worst way possible,” said Ben Clarke, a researcher at Imperial College London, and an author of the analysis.

A separate study from Climate Central found climate change also made the warm Atlantic Ocean temperatures that fueled the heavy rain 50 to 300 times more likely.

Hotter oceans provide more energy to storms, while warmer air is able to hold more moisture, soaking it up like a sponge to wring out in the form of torrential rain.

“In the context of climate change, these types of intense and exceptional rare rainfall events are going to become more frequent and more intense and, therefore, destructive,” said Ernesto Rodríguez Camino, senior state meteorologist and a member of the Spanish Meteorological Association.

How does this compare?

This week’s floods are the most deadly Spain has suffered in decades.

In 1959, 144 people were killed by a flood in the Spanish town of Ribadelago. However, that disaster was caused by the failure of a dam, releasing water from the Vega de Tera reservoir, rather than a natural event.

The last comparable natural disaster was in 1996, when floods killed 87 people near the town of Biescas in the Pyrenees mountains.

While Spain has experienced significant autumn storms in recent years, nothing comes close to the devastation wrought over the past few days.

This story has been updated with additional developments.

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