Affected for several days by an unprecedented heat wave, the northwest of America is suffocating.
In Canada, the city of Lytton, near Vancouver, recorded a temperature of 49.5 degrees ... In Portland, in the United States, the mercury rose to 46.1 °.
The consequences of this heatwave are dramatic and result in several hundred sudden deaths, increased hospitalizations and the increase in forest fires.
This heat wave has its origin in a phenomenon called "Heat dome".
Explanations with climatologist Christophe Cassou, research director at CNRS.