 They're being told to stay indoors this weekend where it's cool and urged to cancel outdoor activities during the hottest part of the day. The National Weather Service has issued a heat advisory tomorrow through Sunday for most of the Front Range, including the Denver metro area as well as Colorado Springs. Now temperatures are forecast to soar into the triple digits. And if you're looking for the best way to beat the heat as the swelting temperatures continue to punish much of the nation,