BEIJING, Aug. 4 (Xinhua) -- The Danube has long connected the heart of Europe. This summer, its shrinking waters have offered a stark reminder of the growing risks posed by a warming Earth.

Water levels along parts of the river have fallen to their lowest in decades, disrupting shipping, straining agriculture and putting pressure on energy supplies.

The Danube's retreat is one of the latest reminders that the consequences of climate change are becoming too severe and too costly to ignore.

Europe is hardly alone in the face of the pressing global climate challenge. Wildfires have spread across the Mediterranean, while heatwaves, floods and droughts are battering communities from North America to South Asia, from the Sahel to the Pacific islands.

The impacts differ from place to place, but the message is universal: climate change is no longer a future threat.

More than a decade ago, the international community came together to adopt the landmark Paris Agreement, committing to pursue efforts to limit global warming to 1.5 degrees Celsius above pre-industrial levels.

Right now, the most pressing question is whether global action can keep pace with the rising risks. Every year of delay raises the economic and human costs of adaptation. Every major disaster exposes weaknesses in infrastructure, food security, public health and energy systems. Climate change has become a defining challenge for global development and resilience.

Yet just as the impacts of climate change become more visible, political commitment in parts of the developed world has been weakening.

In the United States, historically one of the largest greenhouse-gas emitters, the current administration has dismissed climate change as a "hoax" and rolled back policies aimed at reducing emissions and accelerating the energy transition.

In Europe, governments have also faced growing political resistance to some green measures amid concerns over energy costs, industrial competitiveness and public pressure. Such reversals risk widening the gap between the urgency of the climate challenge and the pace of policy responses.

That gap also raises a fundamental question of responsibility.

The atmosphere may not distinguish between emissions by origin, but history does. Today's developed economies built much of their prosperity during two centuries of carbon-intensive industrialization. Their cumulative emissions remain far larger than those of most developing countries, many of which now face the gravest climate impacts despite contributing comparatively little to the problem.

This is why climate action cannot be reduced to headline pledges or net-zero slogans.

Developed countries must honor long-standing commitments on climate finance, accelerate technology sharing and help vulnerable countries strengthen their capacity to adapt. The developing world, meanwhile, should seize the historic opportunity to place green transformation at the heart of its economic development. Expecting all countries to shoulder identical burdens would be neither fair nor effective.

"The warm-up act is over. We cannot afford to wait for the main event," UN Secretary-General Antonio Guterres warned late last month.

Climate change has never respected national borders. Neither should the response. The Danube's receding waters are not simply Europe's warning. They are the world's.

The choice facing governments is no longer whether to take climate change seriously, but whether they can turn recognition into action before today's warnings become tomorrow's harsh-reality.