Central Vietnam has become the latest epicenter of a deadly rainy season in Asia that has been supercharged by climate change, and seems to drag on without end.

More than 90 people in the nation have been killed in the past week from flooding and landslides, and around a dozen more are missing, government officials reported Sunday.

In one province, more than six feet of rain has fallen over the past few days. Peak coffee harvesting has been delayed. One government report noted that at least 200,000 homes have been flooded from the weekend’s heavy rains.

“It’s never happened like this before,” said Dao Dang Cong Trung, 44, the leader of a small rescue team from Hoi An who took his speedboat to the most damaged areas. “Local residents told me the floodwater rose too fast and they didn’t have time to do anything, so the damage is severe to their houses and many people died.”

Vietnam has been hit by 14 typhoons this year. Five was the average a few decades ago. The rain from the past few days did not even come from a cyclone — but to add inundation on top of injury, a 15th major storm has just formed off the country’s south central coast.

Images of this year’s relentless battering — of thick, soupy brown water sloshing over homes, shops, coffee plantations, tourist hotels and family tombs — have become both ubiquitous and disorienting. They can be hard to place in time, for many, because even as the rainy season is supposed to fade (as of this month), the floods have spread.

Central Vietnam has been the hardest hit, from around Da Nang last month to more than 300 miles south, near Nha Trang, where the suffering is concentrated now.

But Ho Chi Minh City flooded in August and again in early November. Hanoi was underwater last month, in a two-week period when three typhoons hit Vietnam. The rivers around Hue, a onetime royal capital, rose by 17 feet during a wet stretch of October, carrying muck into carefully restored historic buildings.

Frequent wars and hardship, along with a forward-looking culture, have made the Vietnamese people extremely resilient. Standing on tables to stay dry and pushing motorbikes through sludge, few have complained or assigned blame.

Donors in drier areas have been quick to mobilize. In Ho Chi Minh City, metro stations became collection sites Sunday for mountains of food and clothing to help those farther north.

Online and in private, however, some Vietnamese have begun to criticize the government’s lack of preparedness and slow response. Natural disasters have left nearly 300 people dead or missing in Vietnam and caused more than $2 billion in damage between January and October, according to the national statistics office.

Why, many ask, aren’t alarm and evacuation systems providing more help to residents as rivers rise? Why aren’t mitigation systems stronger, guiding water away from population centers?

Huynh Ngoc Phuong, 51, said the discharge from dozens of reservoirs for irrigation and hydropower seemed to contribute to the flooding.

To save his family from waters that rose by three feet in 20 minutes on the night of Nov. 19, he said he had to punch a hole in the roof of his home in the central province of Khanh Hoa. One of his children almost drowned. At least three of his neighbors were killed.

“The whole village is destroyed — trash, TVs, fridges and mud are everywhere,” he said in an interview Monday after the waters receded but government aid had still yet to arrive. “Everyone was turned upside down. I don’t know where and how to begin to start life again.”

Climate scientists stress that Vietnam — along with many other nations — needs to move faster to get ahead of rapid change caused by global warming.

The old standards, for rain, storms or how high rivers will rise, no longer fit an era when research shows that once-in-a-century extremes can happen far more often than that.

Geographically, Vietnam is especially vulnerable. A 2024 study identified it as a climate change “hot spot,” showing that warming temperatures adding moisture to the atmosphere and heating up the South China Sea would combine with typhoon patterns to create a vortex of risk.

“We wrote that in 2024, thinking it would be something that would play out over the next few decades, not the next 12 months,” said Benjamin P. Horton, Dean of the School of Energy and Environment at the City University of Hong Kong, and a co-author of the report.

Mr. Trung, the rescuer with the boat, said he was still trying to process the disasters that no longer seem natural.

“I didn’t know what to feel,” he said. “I tried to rescue as many as I could. But there were many that I was not able to help.”