In the United States, we experienced more than 80 “billion-dollar” climate and weather disasters in the last decade, and several have cost much more. The regularity of these episodes and the resulting damage shows that we are not prepared for the current climate, let alone a changing one that portends more weather extremes.

From these disasters, we can take away two lessons: Increasing resilience now can build protection for the future, and stressed systems are more prone to disasters.

For instance, the risk from a period of extremely low water supply in California is far greater when high temperatures, like those we’ve seen here over the last two years, prolong drought. There are also risks when the combined demands of households, manufacturing, farming and ecosystems tax water supplies even in good years, or when forest management practices create conditions that fuel fires. Californians will benefit by reducing these interacting stresses.

We are not arguing that the drought has been caused by climate change alone, or that all weather disasters have a link to climate change. However, the evidence is clear that many areas of the globe are experiencing increasing risks from weather and climate hazards. As with the California drought, climate change is an important thumb on the scale, increasing the odds of particular extremes in specific places.

In California, we can expect warmer winters and hotter summers, drier dry years and wetter wet years, and less water storage from snowpack in the mountains, which also controls flooding. This means more years with extreme fire danger, critically overdrawn groundwater, legal water rights that exceed the amount of water available and challenges to balancing trade-offs among water storage, flood control and environmental protection.

We have opportunities to rethink the fundamental structure of water rights and markets, re-engineer water storage to compensate for decreasing snowpack, update regulations and infrastructure to embrace water reuse and recycling, and regulate end-user pricing to encourage conservation. In short, we benefit from incorporating climate-related risks in planning for California’s future.

Fortunately, California has many assets, including historical experience, robust institutions, sophisticated science and engineering expertise and financial flexibility. Capitalizing on these assets can reduce risks today and set a path for a vibrant future. Doing so will begin by acknowledging that we are already living in a rapidly changing climate.