Southern states experience dangerous heatwave with temperatures in triple digits fahrenheit for third week running
The US has faced severe weather conditions in the past week, with air quality warnings issued across the midwest and north-east, affecting more than 100 million people.
Smoke from more than 450 Canadian wildfires spread across the US, resulting in poor air quality, with some states labelled as having “unhealthy” or “very unhealthy” conditions.
