 Excessive heat warnings once again for folks in the Southwest and the West. The White House taking note of that, says ABC's Molly Nagel in Washington. Today, President Biden will propose a new rule aimed at protecting workers from extreme heat. If passed, it would require workers get access to drinking water and a break area to cool down if the heat index reaches 80 degrees. And at 90 degrees, employers would need to provide mandatory paid rest breaks, among other actions.