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Colorado wildlife officials are trying to track down mountain lions sighted in Boulder, including the one that became trapped inside a home and killed a house cat last week.

Courtesy of the Denver Fire Department

Nine people were injured, one critically, by an apparent natural gas explosion in Denver on Tuesday, firefighters said.

Jeffrey Beall / Wikimedia Commons

The Colorado baker who wouldn't make a wedding cake for a same-sex couple and won a ruling at the U.S. Supreme Court is suing the state over another discrimination allegation.

Ashley Jefcoat / KUNC

Hailstorms inflict billions of dollars in damage yearly in North America alone, and the cost will rise as the growing population builds more homes, offices and factories, climate and weather experts said Tuesday.


Smoke from wildfires burning in Colorado and beyond is hanging over large parts of western Colorado.

Periods of moderate to heavy smoke are expected there Tuesday through Wednesday morning. State health officials warn that people with respiratory illnesses, the very young and elderly may want to remain indoors if the smoke is heavy.

Erin O'Toole / KUNC

Petitions for an anti-fracking measure and an energy industry-backed property rights initiative topped the list of proposed November ballot questions submitted to Colorado's secretary of state ahead of a Monday deadline.

U.S. Environmental Protection Agency

A truck hauling waste from a Colorado mine - the source of a 2015 spill that polluted rivers in three states- crashed into a creek on Monday, spilling at least some of its load into the water, authorities said.

The driver was not seriously injured, but about 9 cubic yards of sludge spilled into the water, officials said.


An illegal campfire likely ignited another destructive blaze in Colorado, an outcome authorities were trying to avoid across the hot, dry U.S. West by enforcing strict fire rules and closing some public lands.


Three people have been arrested for allegedly starting a Colorado wildfire by leaving an unauthorized campfire unattended.

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[Updated 7:45 p.m.] U.S. Rep. Jared Polis has won the Democratic primary in the race to replace Colorado Democratic Gov. John Hickenlooper.

Polis secured the nomination Tuesday against former state Treasurer Cary Kennedy, former state Sen. Mike Johnston and Lt. Gov. Donna Lynne.