* India reports record single-day rise in infections, deaths
* Overwhelmed crematoriums burn bodies in parks, parking lots
* Biden pledges support as international aid ramps up


India's toll from the coronavirus surged past 200,000 on Wednesday, the country's deadliest day yet, as shortages of oxygen, medical supplies and hospital staff compounded a record number of new infections.
The second wave of infections has seen at least 300,000 people test positive each day for the past week, overwhelming healthcare facilities and crematoriums and driving an increasingly urgent international response.
The last 24 hours brought 360,960 new cases for the world's largest single-day total, taking India's tally of infections to nearly 18 million. It was also the deadliest day so far, with 3,293 fatalities taking the toll to 201,187.
Experts believe the official tally vastly underestimates the actual toll in a nation of 1.3 billion, however.
In the capital, New Delhi, ambulances lined up for hours to take Covid-19 victims to makeshift crematorium facilities in parks and parking lots, where bodies burned on rows of funeral pyres.
Coronavirus sufferers, many struggling for breath, flocked to a Sikh temple on the city's outskirts, hoping to secure some of its limited supplies of oxygen.
Hospitals in and around the Indian capital said oxygen remains scarce, despite commitments to step up supplies.
"We spend the day lowering oxygen levels on our ventilators and other devices as our tanks show alarmingly dipping levels," Dr Devlina Chakravarty, the managing director of the Artemis hospital in the suburb of Gurgaon, wrote in the Times of India newspaper.
"We make hundreds of calls and send messages every day to get our daily quota of oxygen."
Delhi Chief Minister Arvind Kejrilwal said people were falling sick more severely and for longer periods, stacking up the pressure.
"The current wave is particularly dangerous," he said.
"It is supremely contagious and those who are contracting it are not able to recover as swiftly. In these conditions, intensive care wards are in great demand."
Police said a fire early on Wednesday at a hospital on the outskirts of the financial capital of Mumbai killed four people and injured several more.
Accidents at hospitals have become a special concern as India runs short of beds and oxygen supplies. Last week a fire at a hospital treating Covid-19 patients and a leaking oxygen tank at another killed 22 people.
Supplies arriving in New Delhi included ventilators and oxygen concentrators from Britain, with more sent from Australia, Germany and Ireland.
"First shipment of oxygen generators from #Taiwan to #India is leaving this week," Kolas Yotaka, a spokeswoman for Taiwan President Tsai Ing-wen, said on Twitter.
"We are all in this together."
Several countries have suspended flights from India, among measures to keep out more virulent variants of the virus.
Credit rating agency S&P Global said India's second wave of infections could impede its economic recovery and expose other nations to further waves of outbreaks.
The Asia-Pacific region, in particular, was susceptible to contagion from the highly infectious variants in India, given the region's low ratios of vaccination, it added. US President Joe Biden said he had spoken at length with Indian Prime Minister Narendra Modi on issues such as when the United States would be able to ship vaccines to the South Asian nation, and added that it was his clear intention to do so.
"I think we'll be in a position to be able to share, share vaccines, as well as know-how, with other countries who are in real need. That's the hope and expectation," he told reporters at the White House on Tuesday.
The US State Department's coordinator for global Covid-19 response, Gayle Smith, warned that India's challenge called for a sustained effort: "We all need to understand that we are still at the front end of this. This hasn't peaked yet."