"The situation in India is beyond heartbreaking," Tedros told reporters.
He spoke about India's rising number of positive cases that that has overwhelmed hospitals, with crematoriums working at full capacity.
A surge in recent days has seen patients' families taking to social media to beg for oxygen supplies and locations of available hospital beds and has forced the country's capital New Delhi to extend a week-long lockdown.
Tedros said, "WHO is doing everything we can, providing critical equipment and supplies."
He said that the UN health agency was among other things sending "thousands of oxygen concentrators, prefabricated mobile field hospitals and laboratory supplies."
The WHO also said that it had transferred more than 2,600 of its experts from various programmes, including polio and tuberculosis, to work with Indian health authorities to help respond to the pandemic.
As per the source, the US and Britain rushed ventilators and vaccine materials to help India fight the pandemic.
Tedros mourned that global new cases have been rising for the past nine weeks straight. "To put it in perspective, there were almost as many cases globally last week as in the first five months of the pandemic," he said.
Likewise, the United States remains the worst-affected country, with some 572,200 deaths and over 32 million infections, followed by Brazil and Mexico. But India, in fourth place, has in recent days been driving the global number of cases.
Maria Van Kerkhove, the WHO's technical lead on COVID-19, said that the exponential growth that they have seen in case numbers is really astonishing. Also, she warned that India was not unique, as a number of countries had seen a similar situation of the rising number of COVID cases.
India continues to report over 3 lakh new cases daily with over 2000 deaths due to the virus. The pandemic has put a strain on the medical infrastructure of the country, with hospitals battling a shortage of oxygen and beds. As of April 27, India saw 2,771 deaths due to COVID in the last 24 hours.
Due to the shortage of oxygen in India, many COVID patients have died daily in the hospitals of Hisar (Haryana), Delhi, Mumbai, Nashik, Amritsar, and more.