As temperatures rose above 100 degrees Celsius on Thursday in Colorado, the extreme fire risk reached critical levels and led to forest fires from Fort Garland to Grand Lake.
It has never been so hot in Denver as reported on Thursday by the National Weather Service in Boulder. The high of 105 degrees of the city combined the record for its hottest day. It was just so hot four other times – on June 25 and June 26, 2012; July 20, 2005; and August 8, 1878.
Colorado Springs' altitude of 100 degrees broke the record for June 28 – 98 degrees – discontinued in 1990, the National Weather Service reported in Pueblo.
And in Pueblo, temperatures of 1
red flag warning signs were everywhere in the state for gusty winds, low relative humidity and dry fuels. Warnings were also issued for Friday in most of western Colorado and parts of southern Colorado.
"In these conditions, rapid rates of fire and spread are possible," it says in a warning.
El Paso County will not be under Warning Friday
A conflagration east of Fort Garland in southern Colorado had grown to 38,400 acres, destroying some structures that forced people to evacuate around 350 homes in Forbes Park, a housing estate started by multimillionaire Malcolm Forbes in the 1970s.
The fire was kept at zero on Thursday.
The Costinla County Commissioners declared catastrophic late Wednesday night, The Denver Post reported.
Another bushfire forced about 300 homes west of Rocky Mountain National Park to evacuate. The fire had burned only 5 to 10 acres and had not passed into the national park or had road closures, but a trail was closed.
Elsewhere, fires were closed and residents were allowed to go home.
The San Juan National Forest, closed on June 12, when two burns burned there, was reopened Wednesday after it rained, The Post reported.
But the Durango & Silverton narrow-gauge railway will not re-start its coal-fired steam trains until at least July 12, after the annual monsoon arrives. The tourist attraction suspended service June 1 due to forest fires in the area. [4,459,002] The 416 fire near Durango had burned 37,488 acres and was contained 37 percent Thursday. But fire department officials said they expected it to grow on its north and northwest sides, probably visible from US 550 smoking. A red flag warning for this area along with a fire weather clock for Friday, the Durango Herald was issued.
Meanwhile, the 90-acre buffalo fire that burned near Silverthorne last week was 95 percent, FOX 31 reported.
It is expected that the overwhelming heat will sustain many of the state for several days ,  But in Colorado Springs, temperatures are expected to drop over the weekend as there is a slight chance of thunderstorms.
The weather service forecast highs of 95 degrees on Friday, 76 on Saturday and 81 on Sunday. Sunny weather is expected on Friday, with a 20 percent probability of thunderstorms starting at 12 noon.
The Associated Press has contributed to this report.