The firestorms ravaging the North Bay continue to spread across multiple counties. According to the Los Angeles Times, at least 17 are dead, and hundreds have been reported missing. Strong winds on Wednesday and Thursday could spread embers further to populated areas of Santa Rosa and Calistoga.

While the loss of life and the safety of those evacuated is most pressing, some are already starting to process what the effect of the fires will be when people return to their homes or try to rebuild. According to a Curbed SF report, California-based property analytics firm CoreLogic estimates roughly 200,000 homes are at risk for at least some degree of potential fire damage in Sonoma and Napa Counties.

The firm states that 2,600 homes in Napa County and 8,400 homes in Sonoma County are at “high risk” or “extreme risk” from wildfires. Based on housing density, lay of the land, wildfire history, and wildfire likelihood, the firm defines risk on a scale of 1 to 100, with scores over 80 deemed “extreme risk” and scores between 61 and 80 deemed “high risk.”

The potential cost in the region of rebuilding from all the fire damage could be up to $65 billion. Note that the estimates are made in a hypothetical model, and the actual outcome of the firestorm could prove to be a test for the accuracy of CoreLogic’s predictions.