Aug 8, 2018 - Energy & Environment

California just had its hottest month on record

Children play beside a lifeguard tower as sunset approaches at Sunset Beach in Huntington Beach, California on July 21, 2018.

TOPSHOT - Children play beside a lifeguard tower as sunset approaches at Sunset Beach in Huntington Beach, California on July 21, 2018. Photo: FREDERIC J. BROWN/AFP/Getty Images

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.

The details: The state's average monthly temperature of 79.7°F beat the previous record-holder for the state's warmest month by just 0.2°F, which occurred in July 1931.

  • At 108.1°F, Death Valley, California, had the hottest average monthly temperature for any recording station in the world.
  • The region where both the Mendocino Complex Fire and the deadly Carr Fire have burned also had its warmest month since reliable instrument records began in 1895.
  • For example, Redding, California, which was the site of an anomalous, destructive fire tornado had its warmest July on record as well, with an average temperature of 99.6°F.
  • A heat wave in early-to-mid July saw numerous all-time heat records fall, including in Los Angeles, where the temperature soared to 111°F.
    • In fact, according to NOAA, the U.S. had its warmest May through July period on record, beating the Dust Bowl record from 1934. Numerous states had a top-10 warmest July, but none set a record as California did.

NOAA connected the dots between the unusually hot weather and perilous wildfire situation in a tweet on Wednesday:

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