NEW DELHI — More than a year after the pandemic began, infections worldwide have surpassed their previous peak. The average number of coronavirus cases reported each day is now higher than it has ever been.

“Cases and deaths are continuing to increase at worrying rates,” said World Health Organization chief Tedros Adhanom Ghebreyesus on Friday.

A major reason for the increase: the ferocity of India’s second wave. The country accounts for about one in three of all new cases.

It wasn’t supposed to happen like this. Earlier this year, India appeared to be weathering the pandemic. The number of daily cases dropped below 10,000 and the government launched a vaccination drive powered by locally made vaccines.

But experts say that changes in behavior and the influence of new variants have combined to produce a tidal wave of new cases.

India is adding more than 250,000 new infections a day — and if current trends continue, that figure could soar to 500,000 within a month, said Bhramar Mukherjee, a biostatistician at the University of Michigan.

While infections are rising around the country, some places are bearing the brunt of the surge. Six states and Delhi, the nation’s capital, account for about two-thirds of new daily cases. Maharashtra, home to India’s financial hub, Mumbai, represents about a quarter of the nation’s total.

Mohammad Shahzad, a 40-year-old accountant, was one of many desperately seeking care. He developed a fever and grew breathless on the afternoon of April 15. His wife, Shazia, rushed him to the nearest hospital. It was full, but staffers checked his oxygen level: 62, dangerously low.

For three hours, they went from hospital to hospital trying to get him admitted, with no luck. She took him home. At 3:30 a.m., with Shahzad struggling to breathe, she called an ambulance. When the driver arrived, he asked if Shahzad truly needed oxygen — otherwise he would save it for the most serious patients.

The scene at the hospital was “harrowing,” said Shazia: a line of ambulances, people crying and pleading, a man barely breathing. Shahzad finally found a bed. Now Shazia and her two children, 8 and 6, have also developed covid-19 symptoms.

From early morning until late at night, Prafulla Gudadhe’s phone does not stop ringing. Each call is from a constituent and each call is the same: Can he help to arrange a hospital bed for a loved one?

Gudadhe is a municipal official in Nagpur, a city in the interior of Maharashtra. “We tell them we will try, but there are no beds,” he said. About 10 people in his ward have died at home in recent days after they couldn’t get admitted to hospitals, Gudadhe said, his voice weary. “I am helpless.”

Kamlesh Sailor knows how bad it is. Worse than the previous wave of the pandemic, like nothing he’s ever seen.

Sailor is the president of a crematorium trust in the city of Surat. Last week, the steel pipes in two of the facility’s six chimneys melted from constant use. Where the facility used to receive about 20 bodies a day, he said, now it is receiving 100.

“We try to control our emotions,” he said. “But it is unbearable.”