California wildfires now larger than New York City and Boston combined

Firefighters are struggling to contain the biggest of six blazes burning in southern California, with the Thomas Fire slipping from 15% containment to 10% Sunday.

Covering 230,000 acres, the Thomas Fire is now the fifth largest blaze in modern California history. The fires are collectively burning an area larger than New York City and Boston combined.

Gusty winds and dry conditions are not helping the wildfire's spread, and there's no rain in the forecast for at least 10 days