The strongest storm of the season delivered an inch or more of rain this week to parts of Los Angeles County with the most significant rainfall yet to come.

British insurer Lancashire Holdings said on Thursday it expects losses of between $145 million and $165 million related to the California wildfires.

Forecasters released a breakdown Tuesday of where and when heavy rainfall this week is expected to hit areas of Southern California left burn-scarred by recent wildfires, raising the risk of potentially dangerous debris flows in those parts of the region.

After an abnormally dry start to the season, more than 2 inches of rain are expected to fall in Los Angeles later this week.

A monster rainstorm was drenching southern California on Thursday, with officials in Los Angeles readying for flooding and landslides in areas burned by last month's huge wildfires.