this is "world news now" with john muller and diana perez. hello, everybody, on this thursday. look who made it back. >> i'm back. here i am. >> how was it? how was your time? >> a great vacation. i went out west. i was in the mountains of lake tahoe, in san francisco for a while. when i got on the plane tuesday in san francisco, it was 68 degrees. when i get back to the east coast, it's 96 degrees. >> and the heat is getting worse and worse. >> the only place that wasn't hot in the whole country. >> you escaped it for a little while. >> a couple days. >> we're glad to have you back. >> i'm glad to be here. >> and i have to say, i'd normally say, you have a tan but you don't even have a tan. >> i wore my sunscreen. i was a good boy. it was very foggy in san francisco, so you didn't get a whole lot of sun. >> but you had a great time. >> i had a great time. >> should we get right to it? >> let's do it. more americans know this miserable heat firsthand today. we're going to get a heat wave that's just getting worse. >> 20 states are under heat