text:  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. Forecasters believe Reno will tie its record of 10 consecutive days over 100 degrees. For NPR News, I'm Paul Boger in Reno.