The US Environmental Protection Agency (EPA) has released a major climate change report that had been delayed by the Trump White House since 2017.
The Climate Change Indicators report takes in data from dozens of US agencies, and shows the damage climate change has already caused.
Under former President Donald Trump, the EPA's Climate Change Indicators website was not updated, as it had been under his predecessor, Barack Obama.
Mr Trump has long been a sceptic of human-caused climate change, at times calling it a "hoax".
EPA Administrator Michael Regan said in a statement on Wednesday announcing the resumption of the report: "Combatting climate change - it's not optional.
"We know that tackling the climate crisis is the single best opportunity we have to strengthen our economy, to put people back to work and to build a healthier, more equitable environment for our communities across America.".
The average decrease for that month amounts to about 900,000 sq miles (1,450,000 sq km) - "a difference three and a half times the size of Texas", the report says.
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