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The short version

  • Online prediction markets are experiencing rapid expansion into climate and weather forecasting, with one major platform reporting a fivefold increase in related wagers over the past year.
  • Climate researchers argue that betting on extreme weather events risks normalizing disaster and distracting from urgent mitigation efforts, while raising concerns about potential incentives for arson.
  • While the 1.5C warming target is now considered effectively out of reach, new data suggests both the most catastrophic and most optimistic climate scenarios are becoming less likely.

The intersection of financial speculation and environmental forecasting has intensified as major online prediction markets pivot toward weather and climate outcomes. Platforms such as Kalshi and Polymarket are moving beyond traditional sports and cryptocurrency betting to offer wagers on specific meteorological events and long-term climate trends. This shift represents a significant expansion in the scope of these markets, which aim to harness collective public opinion to forecast natural phenomena with greater precision.

Kalshi recently disclosed that activity in its weather and climate sectors has grown by 500 percent over the last twelve months, bringing the total market value to approximately $1.1 billion. To enhance the credibility of these new offerings, the company has entered into a partnership with The Weather Company, the entity behind The Weather Channel. Proponents of this model view prediction markets as a form of well-calibrated forecasting data, arguing that they can provide valuable insights into how hot temperatures will rise or how severe flooding might become.

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However, this commercialization of climate risk has drawn sharp criticism from the scientific community. Many researchers express discomfort with the notion of placing bets on the documented destabilization of the global climate system, which is driven by fossil fuel combustion. Critics argue that turning environmental degradation into a game trivializes the raw human suffering associated with extreme weather events. Rather than mobilizing public action against the climate crisis, these markets may distance individuals from the urgency of the situation.

Particular concern has been raised regarding wagers on wildfires. Although platforms like Kalshi and Polymarket state they have banned betting on such events due to the risk of creating unintended incentives for arsonists, large sums were reportedly wagered on the Los Angeles fires during the previous year. Kaitlyn Trudeau, a scientist at Climate Central, described the practice as depressing and distracting. Having lost her grandfather’s home in those same fires, she emphasized that prediction markets do not reduce climate risks or solve the underlying crisis.

The broader context for these market developments is a shifting understanding of global temperature trajectories. The United Nations has recently acknowledged that the international goal of limiting warming to 1.5 degrees Celsius above pre-industrial levels is effectively unattainable. Global heating is proceeding too rapidly and without sufficient restraint, meaning billions of people will face increased exposure to extreme weather, food insecurity, and catastrophic events similar to those recently witnessed in Nepal.

Despite the grim outlook on temperature limits, some previous projections have been revised. The most severe scenario, known as RCP8.5, which envisioned rampant coal burning and unchecked emissions, is now considered unlikely due to the rapid advancement of clean energy technologies. Conversely, the most optimistic scenarios have also faded from consideration. This narrowing of possibilities suggests that while the absolute worst outcomes may be avoided, the world is still heading toward significant disruption.

Adding complexity to these forecasts are natural feedback loops that could accelerate warming beyond current models. Thawing permafrost, massive wildfires, and overheating wetlands are releasing additional greenhouse gases into the atmosphere. A recent study indicates that emissions from these sources could boost overall global heating by up to 30 percent, potentially adding 0.4 degrees Celsius to the temperature rise. This increment represents a substantial increase on top of already disastrous warming trends.

Researchers caution that significant uncertainties remain regarding how sensitive the planet will be to these changes. While humanity retains some control over its future, the situation could escalate rapidly if natural systems are further provoked. The potential for far hotter temperatures than currently predicted remains a serious concern. As prediction markets continue to grow, the question of whether they provide useful data or merely gamify disaster remains unresolved.

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