 According to the National Weather Service, excessive heat warnings, watches, and heat advisories are currently in effect for nearly all of Washington state, Oregon, California, Idaho, Nevada, and southwestern Arizona. In Las Vegas, temperatures climbed to 120 degrees over the weekend, shattering the previously held record high of 118. To help those who can't escape the heat, officials in southern Nevada have opened cooling centers, but space is limited and travel to the centers can be difficult. In northern Nevada, temperatures are expected to stay well above 100 degrees through the weekend.