State Farm, the largest home insurer in California, is asking for an emergency rate hike from state regulators as it warns that multibillion-dollar payouts from the Los Angeles wildfires threaten its balance sheet and the broader insurance market.

State Farm wrote in a letter on Monday that the recent fires in Los Angeles threaten its finances and are “the costliest in the history of the company.”

State Farm has received more than 8,700 claims from the Los Angeles fires alone and paid more than $1 billion to customers, according to the company. The insurer expects to pay out significantly more, and the fires will be the costliest in the history of State Farm, the company said.