A heat dome is expected to bring extremely high temperatures to the western United States. This intense heat wave will affect tens of millions of people from California to Canada. Temperatures are predicted to rise significantly above normal, even for the hottest part of summer.

The heat wave is forecasted to last from Friday to Tuesday, affecting areas including southern California and the northern Rocky Mountains. Further details on the heat wave and its expected impact are available from the source, including specific temperature predictions and affected areas.