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Emily Bit remembers a time when she didn’t feel the constant threat of climate change. Her family lives in American Canyon, in southern Napa county, California, a state now being hit by record high temperatures and devastating wildfires. “It didn’t used to be this bad,” she said.

These days her family has to evacuate their home every summer. Two of her friends lost their homes in Paradise, the town consumed by the 2018 Camp fire disaster, the deadliest in California history. Last year, a wildfire burned the nature reserve behind her local school until it was “entirely black. It was like something from a dystopian novel”.

Related: This town is the first in America to ban new gas stations – is the tide turning?

The Covid-19 vaccine was supposed to bring life back to normal. Then came the Delta variant.

Real-world data collection continues, but it’s clear that the vaccines do offer significant protection against becoming infected by Delta. They offer even greater protection against severe illness: Among states that are reporting breakthrough cases of Covid-19, fully vaccinated people made up no more than 5% of overall hospitalizations.

Related: ‘Masks work’: experts on how to navigate Delta when you’re vaccinated

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