Transcript for Dangerously High Temperatures Over 100 Degrees
Now we move to that scorching heat, a kind of dome trapping searingly hot air over a huge section of this country. We've been looking at the pictures you've been sending out of life inside that dome. A little boy taking refuge at a misting station in vegas. An elephant trying to keep cool at the phoenix zoo. And tonight ginger zee, the temperatures are over 100 degrees and rising. Reporter: Two words to describe this weekend. Almost 100 by sunday in los angeles. We had a terrible heat wave. It's monster hot. Reporter: But it's not just concern for heat alone. The main concern, however, for me, and it should be the main concern for the city, is the extreme fire danger that we face. Reporter: In death valley, they're closing in on the hottest temperature ever. It will be a weekend of breaking records for major cities in the southwest. All thanks to a slow-moving high pressure system, or heat dome. And right here in las vegas, still not the hottest part of the day, and the surface on the strip, reading 164. Don't go barefoot. We'll see sometimes kids with burns on the bottom of their feet because they're not realizing it. We see adults that it happens. Sometimes someone passes out and lands on the pavement, they can get severe burns. 20 to 30 emergency room patients a day come to this hospital alone straight from the strip. Especially tourists who are unfamiliar with how to deal with it. They come in, hanging out at the pool, walking on the strip, they don't realize they're getting dehydrated. I can't imagine alcohol doesn't play a factor? It definitely makes it worse. As you know, sometimes in vegas people drink to excess. It makes you more dehydrated and it makes you a little bit more vulnerable to heat exhaustion. Reporter: In phoenix, temps near 120, they have ice for the monkeys. They're keeping the big cats cool and the melon is frozen for those big guys. I don't think we're going to hit that all-time record high, but i do think we could get to 130 degrees in death valley. If we hit 130, it will have been almost a century.
This transcript has been automatically generated and may not be 100% accurate.