An 18-month-old boy and his 10-year-old sister are among 25 people who were killed in a series of Israeli strikes on central parts of Gaza, hospital officials have said.

Sixteen people were initially reported to have been killed in two strikes on the central Nuseirat refugee camp on Thursday, but officials from the Al Aqsa hospital said bodies continued to be brought in.

The hospital said they had received 21 bodies from the strikes, including some transferred from the Awda hospital, where they had been taken the day before.

Strikes on a motorcycle in Zuwaida and on a house in Deir al Balah on Friday killed four more, hospital officials said, bringing the overall toll to 25.

Five children and seven women are among those who have been confirmed dead.

The mother of the 18-month-old boy is missing and his father was killed in an Israeli strike four months ago, the family has said.

The Palestinian news agency WAFA earlier reported that 57 people had died in the Israeli strikes.

The Israeli military did not comment on the specific strikes but said its troops had identified and eliminated “several armed terrorists” in central Gaza.

It also said its forces had eliminated “dozens of terrorists” in raids in northern Gaza’s Jabalia area – home to one of the territory’s refugee camps.

It comes as the Israeli military said on Friday it killed senior Hamas official Izz al Din Kassab, describing him as one of the last high-ranking members, in an airstrike in Khan Younis.

The Israel Defence Forces (IDF) have over the past few weeks resumed intense operations in the north of Gaza, claiming they are seeking to stop Hamas, the militant group ruling Gaza, from regrouping.

Meanwhile, top UN officials said in a statement on Friday that the situation in northern Gaza is “apocalyptic” and the entire Palestinian population in the area is at “imminent risk of dying from disease, famine and violence”.

The overall number of people killed in Gaza in the 13-month war is more than 43,000, officials from the Hamas-run health ministry in the territory, who do not distinguish between civilians and combatants, reported this week.

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It comes as at least 41 people were killed in Israeli strikes on Lebanon’s Baalbek region on Friday, the regional governor said.

The deaths were confirmed hours after Lebanon’s health ministry said 30 people had been killed in Israeli strikes on the country in the past 24 hours.

It is not clear if any of those killed in the Baalbek region were included in that figure.

In recent days, Israel has intensified its airstrikes on the northeast city of Baalbek and nearby villages, as well as different parts of southern Lebanon, prompting roughly 60,000 people to flee their homes, according to Hussein Haj Hassan, a Lebanese official representing the region.

Israel’s military said in a statement that attacks “in the area of Beirut” had targeted Hezbollah weapons manufacturing sites, command centres and other infrastructure.

Israeli planes also pounded Beirut’s southern suburb of Dahiyeh overnight, destroying dozens of buildings in several neighbourhoods, according to the Lebanese state news agency.

More than 2,800 people have been killed and 13,000 wounded since fighting between Israel and Hezbollah escalated after Hamas’s 7 October attack last year, Lebanon’s Health Ministry said.

Meanwhile, in northern Israel, seven people, including three Israelis and four Thai nationals, were killed by projectiles fired from Lebanon on Thursday, Israeli medics said.

More than 200 people have died in Spain after nearly a year’s worth of rain fell in a matter of hours.

On Friday, there were at least 205 confirmed deaths in Valencia, two in Castilla La Mancha, and one in Andalusia.

Local authorities issued warnings late on Tuesday, but many say this gave them next-to-no time to prepare for the conditions that had killed dozens by Wednesday.

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Here we look at what caused the flooding – and why they could happen again.

How quickly did the floods hit?

Heavy rain had already begun in parts of southern Spain on Monday.

In contrast to areas like Malaga, where residents told Sky News it had been “chucking it down for two days”, the rain did not start in the worst-hit region of Valencia until around 7pm on Tuesday.

At 8pm, people in Valencia received smartphone alerts warning them not to leave their homes.

But by then, many were already trapped in dangerous conditions, particularly in the south of the city where a major road had flooded, leaving drivers stuck in their cars.

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By Wednesday morning, more than 50 people had been found dead.

The Chiva area of Valencia had been hit by 491 litres per square metre of rain in eight hours. Only around 65 l/m2 usually falls in the whole of October.

Storms spread west on Wednesday night and into Thursday, bringing deadly conditions to Andalusia and Castilla La Mancha as well.

What caused them?

Heavy rain is not uncommon across eastern Spain at this time of year.

It’s caused by a weather phenomenon called DANA – ‘depresion aislada en niveles altos’ in Spanish – which translates as ‘isolated low-pressure system at high levels’.

DANA occurs when:

1) Cold air from the north moves south;

2) Warm air then blows over the Mediterranean, rising quickly and forming heavy clouds;

3) The low pressure from the north gets blocked by the high pressure above the water, causing it to slow down or stop completely.

This creates storm-like conditions that cannot move anywhere else – so the rain falls over the same area for a sustained period of time.

What role did climate change play?

General flash floods and those caused by DANA specifically have struck Spain long before humans started warming the climate.

But climate change is making heavy rain worse, and therefore more dangerous.

That’s because hotter air is able to hold more moisture. So when it rains, it unleashes more water.

The current 1.3C increase in global temperatures since pre-industrial times means the air can carry about 9% more moisture.

And higher sea surface temperatures in the Mediterranean are a “key driver” of strong storms, said Dr Marilena Oltmanns, research scientist at the National Oceanography Centre in Southampton.

The world is on track for 3.1C warming by the end of this century, which is expected to make rain heavier still, increasing the chances of flash flooding and giving areas little time to respond.

Imperial College London’s lead for its World Weather Attribution (WWA) group Dr Friederike Otto says there is “no doubt about it”.

“These explosive downpours were intensified by climate change,” she says.

Professor Mark Smith, an expert in water science and health at the University of Leeds, adds that hotter summers also dry out the soil in the ground, which means it absorbs less rain – and more of it flows into rivers and lakes – which flood quicker.

Will they keep happening?

A red weather warning is in place for the Huelva area of Andalusia until Friday afternoon.

Beyond the warning period, storms are set to continue across parts of Spain for several days.

In the longer term, Dr Marilena Oltmanns says: “Given the long-term warming trend, both in the sea surface temperatures in the Mediterranean region and the global air temperature, we expect the events like the currently observed one in Spain to become more frequent.”

Chiva and the surrounding worst-hit area also suffers from the unfortunate geography of being in a river catchment – where water feeds into the River Turia – and close to the mountains. And is not far from the sea.

That means water has little chance to absorb into the land and so builds up very quickly.

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This makes it all the more imperative that forecasts are accurate, authorities prepare accordingly, and residents respond quickly.

Professor Hannah Cloke, professor of Hydrology at the University of Reading, describes people dying in their cars and being swept away in the street as “entirely avoidable”.

“This suggests the system for alerting people to the dangers of floods in Valencia has failed,” she says.

“People need to understand that extreme weather warnings for floods are very different from regular weather reports. We need to consider flood warnings totally differently, more like fire alarms or earthquake sirens, and less like the way we browse daily weather forecasts on our phones or on the TV.”

Gareth Redmond-King, international analyst at the Energy & Climate Intelligence Unit (ECIU), says Spain’s tragedy should serve as a “wake-up call” to the UK.

“This is not about future events in a far-off place with a dramatically different climate from the UK. Spain is one of our nearest neighbours,” he warns.

Survivors of the devastating Spanish floods have told Sky News they feel lucky to be alive.

But they are angry that they have not been given more support by the government, emergency services or the military.

They say they feel forgotten and have been left without power, food or water, despite living within a short drive of one of the biggest cities in Spain.

Instead, we have seen thousands of volunteers helping to clear up some of the towns that were devastated, while others have been left to rely on their own residents to deal with the extraordinary devastation.

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“Tell the world that we have nothing,” says one man as we talk in the town of Albal. There are growing calls for a nationwide protest against what is seen as the slow response of authorities.

But there are also mesmerising stories of survival. In Catarroja, we meet Arkait Iniguez, who returned from his high school in Valencia because of a warning of bad weather.

“At first I was in the water up to my knee,” he says. He wanted to check on his grandmother, who lived nearby, but by the time he had reached her house, the water was rushing so fast that it swept him away.

“The stream was so fast and the level rose. I grabbed the post of a traffic sign so I wouldn’t get taken away. Some neighbours tried to help me – they threw me a rope, but it broke.

“I was there for 20 minutes. Something hit me – I think it was a car, but I can’t be sure. And then the stream got less strong and I could jump on to a car.”

Mr Iniguez was there for hours until he could wade through the water to get to safety.

It is a terrifying story, and the deep cuts on his back are testimony to what happened.

He said: “I thought I might die but I also thought to myself ‘this is not how it should end’.”

As we talk, the road is being washed down by the residents, who have worked relentlessly since the morning. “It is the best road in the town,” says one man. Civic pride, it seems, can survive anything.

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Across this region, we saw thousands upon thousands of people volunteering to help get these towns back towards some kind of functionality. We saw huge, snaking lines of people, holding brooms and brushes, an army of helpers.

What we didn’t see was much sign of the actual army.

Walking through the town of Aldaia, which was swamped with mud and debris, there was frenetic and determined work going on. But all of it from volunteers – many of them young people in their late teens or early 20s.

Nor did we see much of the emergency services.

No doubt they are stretched – and nobody can be fully prepared for a disaster on this level, but the fact is that, when you travel round these beleaguered, battered towns, the impression you get is that all the work is being done by amateurs, while the professionals are largely absent.

Rebuilding will be a colossal job. The physical scars of these floods will last for many years, and so will the emotional ones.

We first see Father Francisco when he is comforting people in the street. His shirt is splattered with mud.

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No, he says, this disaster has not shaken his faith, but it has shaken his emotions. He is close to tears as we talk – exhausted, like his parishioners.

“I would say the main word is shock. We are in shock and you can see the reality has surpassed fiction. This is a horror film, but even more than that.

“This natural catastrophe is worse than a horror movie.”