California wildfire
Extreme weather is occurring more often. These events pose risks to the economy.

This article is part of Insider's "The True Cost of Extreme Weather" project. Read more here.

The climate crisis is about many things. One of them is that tiny numbers add up to big effects.

About two degrees Fahrenheit. That's how much the planet has warmed since the preindustrial era, before the advent of smokestacks and cars.