July marked California's hottest month on record, with an average temperature of 5°F above the 20th Century average, according to data released Wednesday by the National Oceanic and Atmospheric Administration.
Why it matters: The heat helped dry out vegetation, creating ideal conditions for large, rapidly-spreading wildfires. The largest wildfire on record in California, known as the Mendocino Complex Fire, eclipsed 300,000 acres for the first time in state history.


