Explainers

Extreme heat is a dangerous weather condition that is becoming more common and severe as climate change warms the planet.

The urban heat island effect is a phenomenon whereby cities experience higher air temperatures than the surrounding countryside, making them more vulnerable to a warming Earth.

Cities concentrate people into small areas for good reason, but this makes them major sources of greenhouse gases and uniquely vulnerable to climate risks.

Aviation emissions are responsible for around 5% of climate warming, and this share is rising.