Barely three weeks after coming out of lockdown, Spain has seen a surge in cases and health officials monitoring more than 120 active outbreaks.
The most worrying is in and around the northeastern city of Lerida, where the Catalan regional government has issued a stay-home order affecting 160,000 people.
Authorities there and in several other regions have stepped up precautions, with mask-wearing compulsory in public at all times, even if the safety distance can be respected.
Among those attending will be EU Council head Charles Michel, European Commission president Ursula von der Leyen, European Parliament leader David Sassoli and top EU diplomat Josep Borrell.
WHO chief Tedros Adhanom Ghebreyesus will also attend out of respect for “the great number of people who lost their lives to COVID-19 in Spain and the world,” and to stress the UN health body's support for those fighting the virus, a spokeswoman said.
During the memorial, an orchestra will play Spain's national anthem along with Brahms' “Sacred Song” and people affected by the pandemic will also speak.
The government, which has been severely criticised for its management of the crisis, declared a 10-day mourning period for the victims in late May — the longest since Spain returned to democracy after the fall of Franco's dictatorship in 1975.
King Felipe VI of Spain (2L) and his daughter Crown Princess Leonor of Spain leave roses next to a cauldron, flanked by the brother of Spanish journalist Jose Maria Calleja, who died of COVID-19, Hernando Calleja (R) and the Catalan nurse Aroa Lopez (L) during a state ceremony. AFP
Spain suffered a particularly deadly outbreak of the coronavirus which has officially claimed more than 28,400 lives, making it the seventh worst-hit country in the world in terms of death toll.
However, figures provided by the National Statistics Institute (INE) and the Carlos III Health Institute showed that in recent months, the death toll in Spain had been between 43,000 and 44,000 higher than the monthly average.
But the government says such figures include those who died of other causes or had COVID symptoms and never had a PCR test — a key requirement for being added to the official count.
With the population back on the streets and the borders with Europe and a dozen other countries now open, Spain has seen the number of new infections rising.
When the epidemic first hit, the government of Prime Minister Pedro Sanchez declared a state of emergency on March 14, allowing it to impose one of the world's tightest lockdowns.
But it has ruled out any renewal of the measure, saying the regional health authorities will be able to control outbreaks.
“With the peak behind us, the regions have the necessary tools to tackle particular situations. Fresh outbreaks were expected and are occurring in all countries,” deputy prime minister Carmen Calvo said on Tuesday.