Medicanes: Rare, 'Supercharging' Mediterranean Storms that Will Intensify, Suggest Experts

Heavily damaged Derna is shown on Thursday, Sept. 14, 2023, days after Storm Daniel unleashed deadly floods on the eastern Libyan city. (AFP)
Heavily damaged Derna is shown on Thursday, Sept. 14, 2023, days after Storm Daniel unleashed deadly floods on the eastern Libyan city. (AFP)
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Medicanes: Rare, 'Supercharging' Mediterranean Storms that Will Intensify, Suggest Experts

Heavily damaged Derna is shown on Thursday, Sept. 14, 2023, days after Storm Daniel unleashed deadly floods on the eastern Libyan city. (AFP)
Heavily damaged Derna is shown on Thursday, Sept. 14, 2023, days after Storm Daniel unleashed deadly floods on the eastern Libyan city. (AFP)

The flash flood that has killed thousands of people in Libya this week followed a "medicane", a rare but destructive weather phenomenon that scientists believe will intensify in a warming world, reported Agence France Press (AFP).

The term is an amalgamation of the words Mediterranean and hurricane. Used by scientists and weather forecasters, it is less well known to the wider public.

Medicanes are similar to hurricanes and typhoons although they can develop over cooler waters. They can also bear a physical resemblance on satellite imagery as a swirling mass of storm clouds surrounding an eye in the middle.

The Mediterranean cyclones are usually smaller and weaker than their tropical equivalents and have a smaller space in which to develop.

Their peak strength is usually the equivalent of a Category 1 hurricane on the Saffir-Simpson scale, encompassing speeds of 119-153 kilometers per hour.

Fierce winds and rain are unleashed, with Storm Daniel dumping approximately 170 millimeters of rain in less than two days over Cyrenaica, in northern Libya, where rain is scarce during this season.

Once or twice a year

Medicanes tend to form in the autumn when the sea is warm, usually in the western Mediterranean and the region between the Ionian Sea and the North African coast, explained Suzanne Gray, a professor at the University of Reading's meteorology department.

A layer of colder air from higher altitudes forms convections with warmer air rising from the sea that converge around a center of low pressure.

Medicanes form once or twice per year on average, according to the US National Oceanic and Atmospheric Administration.

While hurricanes move from east to west, medicanes tend to go from west to east. Before striking Libya, Daniel pummeled Bulgaria, Greece and Türkiye last week.

Three medicanes occurred off Greece between 2016 and 2018, while in 2019 Spanish weather services identified one between the Balearic Islands and the Algerian coast.

A medicane packing winds of up to 120 kilometers per hour, dubbed Ianos, lashed Greece in September 2020, killing three people in the city of Karditsa and triggering floods, landslides and power cuts. The Italian Island of Sicily was also struck in 2021.

French weather monitor Meteo-France said it is difficult to work out climate signals from medicanes due to their rarity.

Experts say the warming of sea surface temperatures, driven by human-induced climate change, is going to make extreme storms more intense.

"We are confident that climate change is supercharging the rainfall associated with such storms," said University of Reading professor Liz Stephens.

Oceans have absorbed 90 percent of the excess heat produced by human activity since the dawn of the industrial age, according to scientists.

The Mediterranean reached its highest temperature on record in July as Europe baked under a series of heatwaves.

The surface waters of the eastern Mediterranean and Atlantic are two to three degrees Celsius warmer than usual, which would have turbocharged Daniel.

"The fact that Daniel could form into a medicane... is likely a result of warmer sea surface temperatures and hence man-made climate change," added climate scientist Karsten Haustein of Leipzig University in Germany.



Told to Fix Notorious Prison, Israel Just Relocated Alleged Abuses, Detainees Say 

Israeli security personnel stand outside Ofer military prison in the West Bank on Feb. 8, 2025. (AP) 
Israeli security personnel stand outside Ofer military prison in the West Bank on Feb. 8, 2025. (AP) 
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Told to Fix Notorious Prison, Israel Just Relocated Alleged Abuses, Detainees Say 

Israeli security personnel stand outside Ofer military prison in the West Bank on Feb. 8, 2025. (AP) 
Israeli security personnel stand outside Ofer military prison in the West Bank on Feb. 8, 2025. (AP) 

Under pressure from Israel’s top court to improve conditions at a facility notorious for mistreating Palestinians seized in Gaza, the military transferred hundreds of detainees to newly opened camps.

But abuses at these camps were just as bad, according to Israeli human rights organizations that interviewed dozens of current and former detainees and are now asking the same court to force the military to fix the problem once and for all.

What the detainees’ testimonies show, rights groups say, is that instead of correcting alleged abuses against Palestinians held without charge or trial — including beatings, excessive handcuffing, and poor diet and health care -- Israel’s military just shifted where they take place.

"What we’ve seen is the erosion of the basic standards for humane detention," said Jessica Montell, the director of Hamoked, one of the rights groups petitioning the Israeli government.

Asked for a response, the military said it complies with international law and "completely rejects allegations regarding the systematic abuse of detainees."

The sprawling Ofer Camp and the smaller Anatot Camp, both built in the West Bank, were supposed to resolve problems rights groups documented at a detention center in the Negev desert called Sde Teiman. That site was intended to temporarily hold and treat fighters captured during Hamas’ Oct. 7, 2023, attack on Israel. But it morphed into a long-term detention center infamous for brutalizing Palestinians rounded up in Gaza, often without being charged.

Detainees transferred to Ofer and Anatot say conditions there were no better, according to more than 30 who were interviewed by lawyers for Hamoked and Physicians for Human Rights-Israel. AP is the first international news organization to report on the affidavits from PHRI.

"They would punish you for anything" said Khaled Alserr, 32, a surgeon from Gaza who spent months at Ofer Camp and agreed to speak about his experiences. He was released after six months without charge.

Alserr said he lost count of the beatings he endured from soldiers after being rounded up in March of last year during a raid at Nasser Hospital in Khan Younis. "You’d be punished for making eye contact, for asking for medicine, for looking up towards the sky," said Alserr.

Other detainees’ accounts to the rights groups remain anonymous. Their accounts could not be independently confirmed, but their testimonies – given separately – were similar.

The Supreme Court has given the military until the end of March to respond to the alleged abuses at Ofer.

Leaving Sde Teiman

Since the war began, Israel has seized thousands in Gaza that it suspects of links to Hamas. Thousands have also been released, often after months of detention.

Hundreds of detainees were freed during the ceasefire that began in January. But with ground operations recently restarted in Gaza, arrests continue. The military won’t say how many detainees it holds.

After Israel's Supreme Court ordered better treatment at Sde Teiman, the military said in June it was transferring hundreds of detainees, including 500 sent to Ofer.

Ofer was built on an empty lot next to a civilian prison of the same name. Satellite photos from January show a paved, walled compound, with 24 mobile homes that serve as cells.

Anatot, built on a military base in a Jewish settlement, has two barracks, each with room for about 50 people, according to Hamoked.

Under wartime Israeli law, the military can hold Palestinians from Gaza for 45 days without access to the outside world. In practice, many go far longer.

Whenever detainees met with Hamoked lawyers, they were "dragged violently" into a cell — sometimes barefoot and often blindfolded, and their hands and feet remained shackled throughout the meetings, the rights group said in a letter to the military’s advocate general.

"I don’t know where I am," one detainee told a lawyer.

Newly freed Israeli hostages have spoken out about their own harsh conditions in Gaza. Eli Sharabi, who emerged gaunt after 15 months of captivity, told Israel’s Channel 12 news that his captors said hostages’ conditions were influenced by Israel’s treatment of Palestinian prisoners.

Regular beatings

Alserr said he was kept with 21 others from Gaza in a 40-square-meter cell with eight bunk beds. Some slept on the floor on camping mattresses soldiers had punctured so they couldn't inflate, he said. Scabies and lice were rampant. He said he was only allowed outside his cell once a week.

Detainees from Ofer and Anatot said they were regularly beaten with fists and batons. Some said they were kept in handcuffs for months, including while they slept and ate — and unshackled only when allowed to shower once a week.

Three prisoners held in Anatot told the lawyers that they were blindfolded constantly. One Anatot detainee said that soldiers woke them every hour during the night and made them stand for a half-hour.

In response to questions from AP, the military said it was unaware of claims that soldiers woke detainees up. It said detainees have regular shower access and are allowed daily yard time. It said occasional overcrowding meant some detainees were forced to sleep on "mattresses on the floor."

The military said it closed Anatot in early February because it was no longer needed for "short-term incarceration" when other facilities were full. Sde Teiman, which has been upgraded, is still in use.

Nutrition and health care

Alserr said the worst thing about Ofer was medical care. He said guards refused to give him antacids for a chronic ulcer. After 40 days, he felt a rupture. In the truck heading to the hospital, soldiers tied a bag around his head.

"They beat me all the way to the hospital," he said. "At the hospital they refused to remove the bag, even when they were treating me."

The military said all detainees receive checkups and proper medical care. It said "prolonged restraint during detention" was only used in exceptional cases and taking into account the condition of each detainee.

Many detainees complained of hunger. They said they received three meals a day of a few slices of white bread with a cucumber or tomato, and sometimes some chocolate or custard.

That amounts to about 1,000 calories a day, or half what is necessary, said Lihi Joffe, an Israeli pediatric dietician who read some of the Ofer testimonies and called the diet "not humane."

After rights groups complained in November, Joffe said she saw new menus at Ofer with greater variety, including potatoes and falafel — an improvement, she said, but still not enough.

The military said a nutritionist approves detainees' meals, and that they always have access to water.

Punished for seeing a lawyer

Two months into his detention, Alserr had a 5-minute videoconference with a judge, who said he would stay in prison for the foreseeable future.

Such hearings are "systematically" brief, according to Nadia Daqqa, a Hamoked attorney. No lawyers are present and detainees are not allowed to talk, she said.

Several months later, Alserr was allowed to meet with a lawyer. But he said he was forced to kneel in the sun for hours beforehand.

Another detainee told the lawyer from Physicians for Human Rights that he underwent the same punishment. "All the time, he has been threatening to take his own life," the lawyer wrote in notes affixed to the affidavit.

Since his release in September, Alserr has returned to work at the hospital in Gaza.

The memories are still painful, but caring for patients again helps, he said. "I’m starting to forget ... to feel myself again as a human being."