India, gripped by one of the most deadly coronavirus surges seen by any country, will have to be ready for new waves and badly needs more oxygen from other countries, officials said Wednesday.

Facing critical shortages of hospital beds and oxygen, the warnings came as India reported 3,780 new pandemic deaths, a new daily high, and 382,000 new cases. Experts say the peak may not be reached for weeks.

Covid-19 cases and deaths per day in Uruguay, as of April 15, 2021 Covid-19 cases and deaths per day in Uruguay, as of April 15, 2021 Photo: AFP / Gustavo IZUS

According to the International Red Cross, India is bearing the brunt of a coronavirus crisis badly hitting all of South Asia.

K. Vijay Raghavan, the Indian government's principal scientific advisor, said the country of 1.3 billion had to be ready for more trouble even after beating down this wave which has taken India's caseload above 20 million infections.

Relatives grieve as they arrive for the cremation of a loved one who died due to Covid-19, at a crematorium in Moradabad, India on May 5, 2021 Relatives grieve as they arrive for the cremation of a loved one who died due to Covid-19, at a crematorium in Moradabad, India on May 5, 2021 Photo: AFP / Prakash SINGH

"Phase 3 is inevitable given the high levels of circulating virus. But it is not clear on what timescale this phase 3 will occur. We should prepare for new waves," Raghavan told a news conference.

With the government facing criticism as patients die in streets outside hospitals because of the bed shortages, consignments of oxygen and equipment have been arriving from the United States, France, Britain, Russia and other countries in recent days.

Relatives wearing a personal protective equipment (PPE) suit carry the dead body of a Covid-19 victim at the crematorium in Moradabad Relatives wearing a personal protective equipment (PPE) suit carry the dead body of a Covid-19 victim at the crematorium in Moradabad Photo: AFP / Prakash SINGH

And India will need more oxygen from other countries to fight the surge until numbers stabilise, another government official said.

"We did not and do not have enough oxygen," the top government official told reporters, speaking on condition of anonymity. "If we could get more oxygen more lives would be saved."

An employee refills cylinders with oxygen for Covid-19patients, at a refilling centre in Moradabad An employee refills cylinders with oxygen for Covid-19patients, at a refilling centre in Moradabad Photo: AFP / Prakash SINGH

India is also still pressing the United States and other countries to ease restrictions on exports of raw materials for coronavirus drugs such as remdesivir and tocilizumab, the official added.

India, the world's biggest generic drugs maker, was a major supplier of remdesivir last year when the pandemic erupted but cut production when its own first wave fell back.

People wait outside to refill their cylinders with oxygen for Covid-19 patients, at a refilling centre in Moradabad People wait outside to refill their cylinders with oxygen for Covid-19 patients, at a refilling centre in Moradabad Photo: AFP / Prakash SINGH

A Covid-19 coronavirus patient breaths with the help of an oxygen mask inside the Intensive Care Unit (ICU) of the Teerthanker Mahaveer University (TMU) hospital in Moradabad A Covid-19 coronavirus patient breaths with the help of an oxygen mask inside the Intensive Care Unit (ICU) of the Teerthanker Mahaveer University (TMU) hospital in Moradabad Photo: AFP / Prakash SINGH

Hospitals across the country were still suffering Wednesday while courts have stepped up pressure on Prime Minister Narendra Modi's Hindu nationalist government over its response.

"Admissions suspended indefinitely," said Devlina Chakravarty, managing director of the Artemis hospital in Gurgaon, near Delhi, in a Twitter statement blaming oxygen supplies.

Hospitals in Kolkata, Bangalore and other major cities also reported serious shortages.

Stung by growing anger, the central bank said that $6.7 billion in cheap loans would be provided to oxygen, vaccine and drug manufacturers as well as hospitals to help ease the crisis.

India's courts have meanwhile become increasingly vocal critics of the Modi government's handling of the crisis.

Delhi's government says it needs 700 tonnes of oxygen a day for its overwhelmed hospitals but the Supreme Court was told Wednesday that it is only getting 585 tonnes.

Fighting a threat to issue contempt proceedings over its refusal to send more oxygen, central government lawyers said the city needs only 415 tonnes.

The court gave the government until Thursday morning to provide a plan to send extra supplies.

A Delhi High Court which made the contempt threat accused government politicians and officials of "living in ivory towers" while the death toll mounts.

The High Court in Allahabad said the deaths of people in Uttar Pradesh state hospitals "is a criminal act and not less than a genocide" by those meant to be ensuring oxygen supplies.

The government in India's most populous state has denied there are oxygen shortages. It has been accused by civic groups of grossly under-reporting the number of pandemic deaths.

The International Federation of Red Cross and Red Crescent Societies has called for "urgent" international action to prevent "a worsening human catastrophe" across South Asia.

It highlighted the case of Nepal where it said "many hospitals are full and overflowing" with Covid-19 patients and the daily caseload is 57 times higher than one month ago.