India has recorded its highest daily coronavirus death toll of more than 4,000 during the course of the pandemic on Saturday, weeks into the world's worst wave of coronavirus cases.

Iran PressAsia: Over 4,187 deaths were reported in the past 24 hours. Nearly 240,000 people in India are confirmed to have died from COVID-19, with reported infections topping 21 million.

The second wave of coronavirus cases is ripping relentlessly through the country, with around 400,000 new cases and more than 3,500 deaths reported every day.

But as bad as the government's official numbers are, they are almost certainly a vast undercount.

"There's a shortage of tests," Santosh Pandey, who resides near the holy city of Varanasi in northern India, told NPR in April. "Nobody's getting tested, so the government's numbers for our district are totally wrong."

Crematoriums across India have said only a fraction of the bodies they receive each day are getting counted by the government.

Prime Minister Narendra Modi is coming under increasing criticism for his handling of the crisis. He has not delivered a television address since April 20.

The Lancet, a medical journal, in an editorial called Modi's COVID-19 response "inexcusable" and a "self-inflicted national catastrophe."

And some Indians feel a sense of abandonment.

Medical supply chains have broken and some hospitals have simply run off medical oxygen. Families have been tasked with finding their own cylinders for relatives desperate to breathe.

India's urban centers, including its capital, have so far borne much of the load.

In New Delhi, the Holy Family Hospital is at 140% capacity.

The virus is moving into rural regions, home to the majority of India's more than 1.3 billion people, where a lack of health care centers and testing facilities threatens to make the situation even direr.

A strain known as B.1.617, first detected in India, is now dominating several Indian states. Other more transmissible strains are also circulating, including B.1.351, first identified in South Africa, and B.1.1.7, first found in the U.K.

India's COVID-19 vaccine rollout has been plagued by delays and shortages, even though it is home to the world's biggest vaccine maker, the Serum Institute of India, located in the western city of Pune. So far, nearly 10% of Indians have received one vaccine dose, and around 2% of Indians have been fully vaccinated.

In the absence of national measures, several states are taking a piecemeal approach.

The states of Tamil Nadu and Karnataka in southern India each announced the latest lockdowns, with two weeks of restrictions set to go into effect starting Monday.