Snow drifts reaching up to rooftops kept tens of thousands of villagers prisoners in their own homes Saturday as the death toll from Europe's big freeze rose past 550.

More heavy snow fell on the Balkans and in Italy, while the Danube river, already closed to shipping for hundreds of kilometres (miles) because of thick ice, froze over in Bulgaria for the first time in 27 years.

Montenegro's capital of Podgorica was brought to a standstill by snow 50 centimetres (20 inches) deep, a 50-year record, closing the city's airport and halting rail services to Serbia because of an avalanche.

Eight more people were reported to have died in Romania, taking the toll for the country to 65, three in Serbia, one in the Czech Republic and one in Austria.

Polish fire brigade spokesman Pawel Fratcak said Saturday that defective heating had triggered a spate of deadly blazes in houses and apartments, with eight people killed on Friday night and three the night before.

It sometimes feels as though some months go by faster than others, but November 2009 really did. Events in the Southern Ocean conspired to make the Earth spin ever-so-slightly faster, shortening half of the days in the month by 0.1 milliseconds each.

Different factors affect how fast the Earth spins. For instance, if the winds that whip around the planet slow down, the Earth spins faster to conserve angular momentum.

There was a more down-to-earth cause in November 2009, however. The Antarctic Circumpolar Current is a powerful ocean current that rings the continent. Stephen Marcus and his colleagues at NASA's Jet Propulsion Laboratory (JPL) in California and at the Institute of Earth Physics of Paris in France noticed that it slowed abruptly on 8 November 2009, only to speed up two weeks later.

Precise day-length data revealed that the changes immediately caused the Earth to spin faster, shortening each day by 0.1 milliseconds. Like the currents, day length returned to normal on 20 November (Geophysical Research Letters,).

This is the first time we have seen a rapid change in the oceans that is large enough to affect the Earth's rotation, says Marcus. The event is worth noting as the Antarctic currents directly impact the health of the ice sheets.

The following photographs were taken this morning in Crimea:

On the snowy fringes of Japan's Fukushima city, now notorious as a byword for nuclear crisis, Zen monk Koyu Abe offers prayers for the souls of thousands left dead or missing after the earthquake and tsunami nearly one year ago.

But away from the ceremonial drums and the incense swirling around the Joenji temple altar, Abe has undertaken another task, no less harrowing -- to search out radioactive "hot spots" and clean them up, storing irradiated earth on temple grounds.

The Fukushima Daiichi nuclear plant, some 50 km (31 miles) away, suffered a series of explosions and meltdowns after the massive earthquake and tsunami last March 11, setting off the world's worst nuclear crisis since Chernobyl in 1986 and forcing 80,000 people from their homes.

Radiation, carried on winds and by snow, spread far beyond the 20 km (12 miles) evacuation zone around the plant, nestling in hot spots across the region and contaminating the ground in what remains a largely agricultural region.

A new paper just published in Geophysical Research Letters by Roger Davies and Mathew Molloy of the University of Auckland finds that over the past decade the global average effective cloud height has declined and that "If sustained, such a decrease would indicate a significant measure of negative cloud feedback to global warming."

Davies and Molloy are quick to point out that part of the decline from 2000 to 2010 in cloud height is due to the timing and variability of El Niño/La Niña events over the same period, however, there still seems to be evidence that at least part of the decline may remain even when El Niño/La Niña variability is accounted for.

Figure 1 (below) shows the history of the effective cloud height, as determined by Davies and Molloy from satellite observations, from March 2000 through February 2010.

Acrid smoke from a fire at a sprawling trash dump blanketed swaths of Jamaica's capital Thursday, and officials warned people to stay indoors to avoid exposure to potentially dangerous pollutants.

Jamaica's emergency management office said it would likely take three more days to bring the fire under control and five days after that before the foul-smelling smoke stopped billowing from the Riverton City solid waste dump.

Firefighters have struggled to extinguish the blaze at the seaside dump since it erupted Monday night. On Thursday, the waste management authority appealed for help to people with water trucks and heavy-duty equipment.

More than 20 children have recently died due to the cold weather in Kabul which the Afghan capital has been experiencing its worst cold-snap and heaviest snows in at least 15 years, the National Weather Center said Wednesday. According to an Afghan based TV channel, some of the internally displaced people of the country warn that cold weather may claim more lives. Lack of food and firewood is said to be their main problems in the winter.

This year's severe cold weather has raised concerns among the Afghan population, especially the displaced families. "In this winter, eight children, three old men and women have so far lost their lives," one of the displaced people said. "We cannot pass the winter by burning plastic, paper and pieces of clothes. We really need help.""Living under these tents is very difficult," said another displaced person. "Life is difficult when you don't have anything to eat or burn."The families living under the tents in Kabul are badly in need of help and most of them may perish if not helped."We ask everyone to help these needy families, they can help one family and protect them from cold weather," Head of the Afghan Red Crescent, Fatima Gilani said.

The Afghan Ministry of Refugees and Returnees rejects reports about the death of 20 children due to severe cold in Kabul, a spokesman for the Ministry, Salamuddin Jurat said on Tuesday.The refugees living under the tents have not faced any kinds of losses so far, he added. "The reports are baseless and untrue," the spokesman said.Meanwhile, the Afghan Ministry of Public Health confirms the deaths due to the severe cold in Kabul."Because the cold weather was unprecedented and they were living under the tents, they died before arriving to our health facility during last month," Spokesman for the Ministry of Public Health, Ghulam Sakhi Kargar told the channel.

There are currently more than 30,000 poor families living under tents in Kabul. There reports of high level of maternity deaths in these camps with 144 out of 1,000 children under five years of age.This comes as the recent avalanches in Badakhshan province claimed lives of more than 40 people.Several houses have reportedly been destroyed in these avalanches. Several routes in Badakhshan, Ghor and Daikundi provinces have been closed due to heavy snow falls.

Belgrade - Thick ice closed vast swathes of the Danube on Thursday, crippling shipping on Europe's busiest waterway, as the death toll from bitter cold across the continent rose to at least 460.

As it has every day for nearly two weeks, the brutal cold claimed lives in several countries and killed dozens more in weather-related accidents.

The 2,860-kilometre (1,780-mile) Danube, which flows through 10 countries and is vital for transport, power, irrigation, industry and fishing, was wholly or partially blocked from Austria to its mouth on the Black Sea.

This week more than 200 dolphins were found dead along a 106-kilometer stretch at the beaches of Lambayeque.

Authorities have not yet been able to determine the cause of the deaths.

According to El Comercio, Edward Barriga, head of Peru's Ocean Institute (Imarpe) in Lambayeque, ordered samples be sent to Lima, for further analysis.

More strandings are expected after 129 dolphins beached themselves on Cape Cod in the last three weeks, with 92 dying in "the single largest stranding" of dolphins in the Northeast since at least 1999, the International Fund for Animal Welfare reported Monday.

On Sunday, four dolphins were stranded along Cape Cod's hook-shaped peninsula and were quickly helped back to sea. The Massachusetts peninsula sees many dolphin strandings each year, but the 129 since Jan. 12 is typically about what rescuers see over an entire year, based on records that go back to 1999, IFAW marine mammal rescue manager Katie Moore told msnbc.com.