Notes today:

• A new polar air mass is set to move over Brazil's agricultural areas this week, on Thursday and Friday, threatening further damage to coffee and sugar cane crops already hurt by previous strong frosts.

• Skeptical inquirer: Once dismissed as just another set of wacky conspiracy theories from the internet, the phenomenon known as QAnon has grown into a malignant force, infecting minds with dangerous fictions and amassing real power.

• New-home sales drop 6.6% in June to 676,000 annual rate.

• Floods in central China, especially in the industrial and transport hub city of Zhengzhou in Henan province, have raised supply concerns and demand for rebuilding damaged infrastructure – so Copper is up.