A powerful heat dome is intensifying over the western United States. This system is expected to bring the hottest temperatures of the year so far. Forecasters predict readings significantly above seasonal norms across much of the interior West. Heat alerts cover large sections of the region, and numerous daily records may be broken. The extreme conditions are anticipated to persist into next week, affecting millions.

An unusually strong heat dome will scorch much of the western United States this weekend, bringing the hottest temperatures so far this year to tens of millions from California to…

The latest in a series of dangerous extreme-heat domes in the United States this year will peak over the southwestern region this weekend