Scorching temps expected for Fourth of July holiday with over 120 million people under heat watch

The video discusses a severe heat wave affecting the US, with 121 million Americans under heat advisories. It highlights the impact on California, including fire risks due to illegal fireworks. A heat dome is affecting the Southeast, with high temperatures and humidity. Severe weather alerts are issued for storms and potential tornadoes in the Midwest. Additionally, Hurricane Barrel, a Category 4 storm, is heading towards Jamaica and may impact Texas.

What precautions should people take during the excessive heat on the 4th of July?

What regions are expected to experience severe weather on the 4th of July?