Countries across Europe set grim Covid-19 records as restrictions are reimposed

Medical staff hold swabs for rapid Covid-19 tests at a high school in Rome, September 28.

London (CNN)As Europe transitions from summer into fall, countries that claimed to have the coronavirus under control are once again seeing a surge in infections. The United Kingdom, which has the biggest death toll on the continent, reported 12,872 new Covid-19 cases on Saturday, more than double the country's most recent seven-day rolling average, according to official figures.

Although the UK government blamed the spike on a "technical issue" where previously unreported infections from the past week had been added to the total, Prime Minister Boris Johnson warned Sunday: "This could be a very tough winter for all of us.
"It's gonna continue to be bumpy through to Christmas," Johnson told the BBC's Andrew Marr. "It may even be bumpy beyond," he said. According to the British government, the UK so far has a total of 480,017 recorded Covid-19 cases and 42,317 deaths.
    Other countries have been setting grim records: Europe's death rate has been rising, the European Centre for Disease Prevention and Control (ECDC) said Thursday in its weekly report.
    In France, the national health agency recorded a daily record on Saturday, with 16,972 new Covid-19 cases in the past 24 hours, surpassing last week's record of 16,096. On Thursday, heath minister Olivier Véran warned that Paris is in danger of returning to lockdown as soon as Monday, after the government said the situation was worsening in the capital.
    Poland reported 2,367 new Covid-19 cases on Saturday, hitting a record high for the third day in a row, according to a series of tweets by the country's health ministry, while Italy reported its highest daily increase since April 24, with 2,844 new coronavirus cases on Saturday.
    A passenger waits to undergo a swab test at a Covid-19 rapid test facility at Fiumicino Airport in Rome, September 25.
    Earlier this week, German Chancellor Angela Merkel warned that at the current rate of infection, her country could see more than 19,000 cases per day by the end of the year.
    Germany reported 2,673 new coronavirus infectio