Nearly 200 million Americans are under heat wave advisories. Here's where it's the hottest.

A dangerous heat wave is affecting nearly 200 million Americans this week as some regions deal with record-breaking heat across the country. There are 35 states under heat advisories and some health officials are warning residents to stay inside to stay safe from the scorching hot temperatures. 

Residents in the Pacific Northwest will likely face triple-digit temperatures this week following a deadly heat wave that was blamed for 63 deaths in June, according to the National Weather Service. In Washington state, there were more than hospitalizations 1,300 caused by the heat, officials said.  "Yes, it's summer, but this type of heat can kill. Avoid strenuous activity during the midday, and bring along extra hydration, even if just going about normal business," the weather service tweeted on Wednesday.