 This is CBS News on the Hour, sponsored by O'Reilly Auto Parts. I'm Stacey Lynn. Extreme heat is blanketing much of the country, and it's going to stick with us for a few weeks. Here's CBS's Adriana Diaz. From the Mexican border all the way up to Canada, temperatures are soaring. The high heat creating a tinderbox for wildfires out west. In California, records more than a cent