Spain's coronavirus death toll jumped by 738 overnight to exceed that of China, where the disease originated, as the country struggled to cope with an accelerating health crisis.
With 3,434 fatalities, Spain now has the second highest number of deaths globally after Italy's 6,820.
Nursing homes across the country have been overwhelmed by cases and a skating rink in Madrid has been turned into a makeshift morgue.
Police stood guard today outside the capital's Palacio de Hielo rink, normally a popular venue for children's birthday parties, as hearses and ambulances arrived at the building.
Broad avenues in Madrid and Barcelona were virtually deserted, as were towns and villages across Spain, while fire engines and tractors sprayed disinfectant to clean streets.
Authorities began to carry out mass testing for public workers in a requisitioned fairground in Madrid, one of the worst-hit regions.
Spanish medical staff, who themselves account for thousands of infected cases, have taken out lawsuits against the government, complaining of the lack of basic protective equipment like masks, scrubs and gloves.
The Spanish army has asked NATO for ventilators, protective gear and testing kits, Armed Forces Chief Miguel Villarroya has said.
The government had ordered €432 million worth of masks, gloves, testing kits and ventilators to be delivered over the next eight weeks, with the first large batch expected this week, Health Minister Salvador Illa said.
Deputy Prime Minister Carmen Calvo tested positive for coronavirus in a test performed on Tuesday after previously testing negative.
Calvo was reported to be doing well and receiving medical treatment.
In an example of how companies are changing assembly lines to produce medical products, a shoe factory in northern Spain has switched to making simple protective masks - first for its own personnel and then for distribution.
"Now we are working hard to ... make something a little more sophisticated for it to reach medical use," Basilio Garcia, chief executive of the Callaghan shoe factory, told Reuters.
Spain is on Day 11 of a 15-day nationwide lockdown which is likely to be extended to 30 days. Schools, bars, restaurants and most shops are shuttered. Social gatherings are banned. People are confined to their homes.
"We have achieved a near total reduction in social contact," health emergency chief Fernando Simon told a news conference, adding that Spain was nearing the peak of the epidemic.
However, the infection rate is still soaring with the number of coronavirus cases increasing by a fifth in 24 hours to 47,610 today.
Aside from the devastating health impact, the lockdown has dealt a punishing blow to the Spanish economy, with tens of thousands of workers temporarily laid off as sectors like retail, tourism and manufacturing grind to a halt.
At Malaga airport in southern Spain, a gateway to the Costa del Sol tourist region, thousands of travellers awaited flights home, many sleeping on seats or on the floor.
The Bank of Spain has said that there had been severe disruption on the economy since early March and a sharp contraction in consumer spending.