The U.S. just experienced a heat wave so intense that 190 million people were under heat advisories.

The claim that 190 million people were under heat advisories during a recent intense U.S. Heat wave is largely supported by multiple credible sources, though exact numbers vary by date and reporting agency. Fox Weather reported that an expansive heat dome brought temperatures above 90 degrees for more than 190 million Americans in the East.foxweather.comfoxweather.comLife-threatening heat dome prompts alerts for 147 million Americans in 28 states Other sources such as Axios and NBC News reported slightly lower figures ranging from about 147 million to nearly 160 million people under heat alerts or advisories around the same period.axios.comaxios.comMillions at risk amid widespread heat wavenbcnews.comnbcnews.comExtreme heat blankets U.S., with almost 160 million under alerts from Texas to...

The variation in numbers likely reflects differences in timing, geographic scope, and definitions of advisories versus warnings. CNN noted that about 125 million people remained under extreme heat warnings and advisories a few days later. These figures indicate a very large portion of the U.S. Population was affected by heat alerts during this event, consistent with the claim's scale.

However, the exact figure of 190 million may represent a peak or specific moment rather than a sustained number across all states simultaneously. Overall, the claim is accurate in conveying the unprecedented scale of the heat wave's impact on public health advisories but should be understood as an approximate figure subject to temporal and definitional nuances.