Reeling from devastating floods this week, Venice suffered another exceptionally high tide on Sunday, with the water peaking at 150 centimeters (4.9 feet), marking the worst week for the historic city since official tide statistics were produced in 1872.

Though lower than the water peak of 187 centimeters on Tuesday - the highest level in 50 years, the third major flooding was still dangerous.

"Maximum attention for today's tide," Luigi Brugnaro, the Italian city's major, tweeted.

Water flooded St. Mark's Square and hundreds of voluntary workers were helping citizens cope with the emergency.

The city beloved around the world for its canals, historic architecture and art, was hit by the week's highest tide on Tuesday. That was just seven centimeters lower than the record 194 centimeters set in 1966 and caused the city's worst flooding in 50 years, submerging nearly 80 percent of the city.

In normal conditions, tides of 80-90 centimeters are generally seen as high but manageable.

With four tides above 140 centimeters since Monday, this is the worst week for high tides in Venice since 1872 when official statistics were first produced.

"This is dangerous, playing havoc on the streets. It's barely left business untouched," CGTN's Danielle Robertson reported.

Mayor Luigi Brugnaro, who has been appointed as special commissioner to deal with the emergency, estimated damages from the flooding in the city since Tuesday at around one billion euros (1.1 billion U.S. dollars).

More than 50 churches in the UNESCO World Heritage Site have suffered damages, let alone other artifacts and stores. The culture minister, Dario Franceschini, was reported to warn the task of repairing the city will be huge.

It's reported that residents whose houses have been hit are eligible for up to 5,000 euros in a government aid, while restaurant and shop owners can receive up to 20,000 euros and apply for more later.

A flood-barrier system called Mose was meant to protect the city of water, however, it has not yet been completed.

"It's been going on for more than a while," a local told CGTN.

Many, including Venice's mayor, have blamed the disaster on global warming and warned that countries prone to natural disasters must wake up to the risks posed by ever more volatile seasons.

(With input from agencies)