People walk in a flooded street during a period of seasonal high water in Venice

People walk in a flooded street during a period of seasonal high water in Venice, Italy, on Sunday.

MILAN — Several Italian cities were on high alert on Sunday after heavy rain overnight, including Venice where residents and tourists were braced for another exceptional high tide.

The city, which suffered its worst flooding in 50 years on Tuesday, will face a high tide at around 5.25 feet at 12:00 GMT, the city’s center for forecasting tides said.

Authorities in Florence and Pisa were also closely monitoring the Arno river, whose water levels rose rapidly in the night due to heavy rain.

The mayor of Venice, Luigi Brugnaro, said on Saturday that the city was preparing for another “tough day.” However, he said the situation was expected to be less dramatic than Tuesday when the flooding left squares, shops, homes and hotels inundated.

Brugnaro, who has been appointed special commissioner to deal with the emergency, estimated damages from the flooding in the city since Tuesday at about $1.10 billion.

On Tuesday the tide peaked at 6.14 feet at 10.50 p.m., just short of the record 194 cm set in 1966. In normal conditions, tides of 80-90 cm are generally seen as high but manageable.

Italy’s longest river, the Po, which runs across northern Italy passing through Turin, was also being monitored on Sunday after its level rose by a meter and a half in the last 24 hours due to heavy rain.

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