Denver, CO
Record-breaking heat wave arrives in Denver: What to expect across Colorado
DENVER — A scorching-hot weather pattern, unusual for Colorado, will sit over the state for the next several days and is expected to break Denver weather records through the weekend.
The record-breaking heat wave has placed the Denver metro and communities along the Front Range including Fort Collins, Boulder, Fort Morgan under a heat advisory starting at 10 a.m. through 8 p.m. each day on Friday through Sunday.
“102° is our expected high today and it looks like we’ll break that record of 101 degrees this afternoon,” said Denver7 Meteorologist Stacey Donaldson. “This weather pattern is the opposite of what we have during high fire danger periods when the wind is blowing and there’s a lot of action going on. This is more stagnant air that will sit over us.”
Weather forecasters and health officials warn Coloradans to stay hydrated and limit outdoor activities during the peak afternoon hours, especially those people who are susceptible to weather-related health issues.
“Highs will soar into the 100-105 degree range each day, and the prolonged period of heat will add to heat stress on people and outdoor animals,” added the National Weather Service (NWS) in Boulder.
Denver7
DENVER WEEKEND TEMPS AND RECORDS
Here’s a look at the expected high temperatures in Denver and the previous record temps.Friday’s high: 102° | Record temp is 101°Saturday’s high: 102° | Record temp is 102°Sunday’s high: 103° | Record temp is 100°
The hottest temperature ever recorded in Denver is 105 degrees and Donaldson said the city has only hit that temp 5 times in the past.
While some Colorado communities could see a 105° degree temp by this weekend, Denver is not expected to reach the all-time record, but here’s when it has happened in the past.
- June 28, 2018
- June 26, 2012
- June 25, 2012
- July 20, 2005
- August 8, 1878
Across Colorado’s urban corridor and northeastern plains, temperatures could range between 98 to 105 degrees or more in some locations.
Denver7
SYMPTOMS OF HEAT EXHAUSTION
Heat exhaustion can develop in just a few minutes. Common symptoms include headache, dizziness, nausea, vomiting, clammy skin and a fast or weak pulse.
According to the Centers for Disease Control (CDC), people suffering from heat exhaustion should sip water, loosen clothes, find a cooler location and apply cool, wet cloths or take a cool bath.
Anyone with heat exhaustion symptoms that last longer than 1 hour or are experiencing worsening conditions should seek immediate medical help.
CDC
SYMPTOMS OF HEAT STROKE
The CDC says heat stroke is the most serious heat-related illness in which the body temperature can rise to 106° or higher in as little as 15 minutes.
Heat stroke symptoms include confusion, slurred speech, heavy sweating, seizures and can be fatal if not treated.If heat stroke is suspected, 911 should be called and the victim should be moved to a shaded or cooler area and outer clothes should be removed.
The CDC says to help cool the victim, wet the person’s skin, soak clothes in water or apply cold wet cloths to the skin.
In addition to the dangerous heat, air quality in the Denver metro will likely remain a concern over the next several days for all people and especially sensitive populations.
An ozone action day alert has been issued by the Colorado Department of Public Health and Environment (CDPHE) until at least 4 p.m. Thursday.
“Continued hot and stagnant weather will allow ozone to reach the unhealthy for sensitive groups…the highest concentrations are expected in southern and western portions of the Denver Metro area,” said the CDHPE.
There is an increased risk of respiratory problems for children, adults and anyone else with lung issues. The CDHPE urges people with breathing or lung issues to reduce time outdoors and avoid any heavy activity during the upcoming heat wave.
“Just a lot of stagnant air that will be sitting over us for the end of the week and the weekend,” added Donaldson.”
NWS Boulder
RARE 100-DEGREE DAY STRETCH IN DENVER
Denver’s official weather reporting station at Denver International Airport last recorded 100 degrees on June 25, 2024. Before that, the last time Denver officially hit 100° was back on August 5, 2022.
Denver has not experienced a streak of three consecutive 100-degree days since June 2021 and before that way back in July of 2012.2012 was a particularly hot period where Denver saw the most 100-degree days ever in a single year reaching a record 13 days of triple digit heat.
Sunday’s temperature will warm close to the all-time record in Denver of 105°.
If Denver reaches 100 degrees Friday, Saturday and Sunday – that would bring this year’s total to 4 days of 100-degree heat and would rank in the Top 10 of 100-degree days by year.
The heat has already made headlines in Denver this summer after NWS data recorded June as the second-warmest on record just behind the scorcher of 2012.
COLORADO HEAT WAVE | FORECAST TEMPS BY CITY
Here’s a look at how high temperatures are expected to peak starting Friday through the weekend in these Colorado communities. To view the chart in fullscreen mode, click this link.
The potential for record-high temperatures stretches across communities along the I-25 corridor and through the plains. If there is moisture to be had in Colorado, any storms would likely form over mountain communities with most of the rest of the state unfortunately remaining dry, according to the NWS.
“This extended heat can have negative impacts on health, especially those sensitive to heat. It is essential to stay hydrated in these conditions and check on loved ones and pets while these conditions persist,” added the NWS.
PREVIOUS DENVER HIGH-TEMPERATURE RECORDS THIS WEEKEND
To break heat records in Denver, the afternoon high temperatures would need to break these previous records for the following days:
- July 12: 101° set in 1971
- July 13: 100° set in 2003
- July 14: 100° set in 1878
For context, the normal afternoon high in Denver for this time of the year is 90 degrees.
Along with the potential health impacts, Xcel Energy urged customers to follow certain tips to help reduce electricity costs during the upcoming heat wave. Customers can conserve energy by opening interior doors to improve air circulation, closing drapes and blinds during the day, and running large appliances like washing machines outside the hottest periods of the day.
To see the 100-degree temps in Denver infographic in fullscreen mode, click this link.

DENVER WEATHER LINKS: Hourly forecast | Radars | Traffic | Weather Page | 24/7 Weather Stream
Click here to watch the Denver7 live weather stream.
Denver, CO
Former Denver Bronco Craig Morton, who became the first quarterback to start Super Bowl for 2 franchises, dies at 83
Craig Morton, who spent 18 years in the NFL and became the first quarterback to start the Super Bowl for two franchises — the Dallas Cowboys and Denver Broncos — has died. He was 83.
Morton died Saturday in Mill Valley, California, the Broncos confirmed through his family.
Morton is one of only four QBs to start the NFL’s biggest game with two organizations. The other three — Peyton Manning, Tom Brady and Kurt Warner — all ended up with at least one win. Morton’s only Super Bowl ring came as a backup.
His first Super Bowl start was in a turnover-plagued Super Bowl V to end the 1970 season — a 16-13 loss by the Cowboys to the Colts. Morton threw the Cowboys’ first touchdown pass in a title game.
Seven years later, and after an unsuccessful stint with the New York Giants, Morton led the Broncos to a matchup against his former team. He threw for 39 yards and four interceptions before getting pulled for Norris Weese in a 27-10 loss, which marked the first of four straight Super Bowl defeats for Denver.
Known for his strong arm, Morton turned in a college football Hall of Fame career at California, where he played for coach Marv Levy and assistant Bill Walsh. Morton went fifth in the 1965 NFL draft to the Cowboys. Oakland also took him in the 10th round of the AFL draft.
He joined a Cowboys team coached by Tom Landry that had veteran Don Meredith at QB. Morton played in four games that season. He then split time with up-and-coming Roger Staubach in 1970-71, the year the Cowboys went to their first Super Bowl.
The next season, Morton and Staubach also split time — at some points, even alternating every play. But ultimately, it was Staubach who took over the starting job, then led the Cowboys to the Super Bowl and a 24-3 win over Miami. Staubach was the MVP of that game and it wasn’t hard to imagine the end of Morton’s time in Dallas.
The Cowboys dealt their backup to the Giants in 1974 for a package that included a pick Dallas would use to take defensive lineman Randy White, who became a Super Bowl MVP and Pro Football Hall of Famer.
Morton struggled in New York, but enjoyed a renaissance after getting traded to Denver before the 1977 season — the season that put the Broncos on the map.
The veteran QB became the final piece for a Broncos team under a new coach, Red Miller, who inherited a strong defense that would become known as the Orange Crush.
Morton led the Broncos to a 12-2 record and playoff wins over the Steelers and Raiders. He famously spent the week in the hospital with a hip injury before spearheading the win over rival Oakland.
Four years later — and after the Broncos had toyed unsuccessfully with finding his replacement — Morton teamed with a new coach, his former Cowboys teammate Dan Reeves. In 1981, Morton threw for 3,195 yards and 21 TDs, both career highs (he matched his best mark in TDs).
He retired after starting three games in the strike-shortened 1982 season. Denver would trade for John Elway, who supplanted Morton as the franchise’s most famous and revered No. 7.
Morton threw for 27,908 yards over his career with 183 touchdowns and 187 interceptions. Morton ranked in the top 20 all-time in yards passing and TD passes when he retired following the 1982 season.
He was voted into the Broncos’ Ring of Fame in 1988, along with two other standouts from that ’77 team — Haven Moses and Jim Turner.
Denver, CO
Broncos Ring of Famer Craig Morton, who led Denver to first Super Bowl, dies at 83
Craig Morton, a Broncos Ring of Fame quarterback who played professionally for nearly two decades, died Saturday at his home in Mill Valley, Calif., at the age of 83.
Morton’s family confirmed his death through the organization, which announced the news on Monday.
Morton led Denver to its first Super Bowl appearance in 1977, quarterbacking the team best known for its ferocious Orange Crush defense. That season, at the age of 34, Morton earned the league’s comeback player of the year award and sparked a six-season run with the Broncos.
“He was our leader that year that we went 12-2, the first year he came to Denver,” fellow Broncos Ring of Famer and former safety Steve Foley told The Post. “It was a magical season. He was just tough as nails.”
Morton was hurt throughout the playoffs and Foley said the quarterback was in the hospital before the AFC Championship Game, when the Broncos beat the Oakland Raiders, 20-17, and advanced to their first Super Bowl appearance.
“I don’t know how he even suited up,” Foley said. “He was black and blue and yellow all over his hip. … Man, he came out and had a great game. He was just tough.
“And what a gem of a guy. Oh, yeah. He had the best heart.”
Morton was the first quarterback to lead two different teams to the Super Bowl, taking the Cowboys there in 1970 before later leading the Broncos.
Morton was born in February 1943 in Michigan, but graduated from high school in California and played quarterback in college at Cal. He also played baseball in college. He was selected No. 5 overall by Dallas in the 1965 NFL Draft, five years before the AFL and NFL merged.
Early in his career, Morton started for Dallas over Roger Staubach before Staubach eventually took over the job.
Morton, though, engineered a long and successful career in pro football.
He played in 207 career games over 18 seasons, including 72 games (64 starts) for the Broncos from 1977-82. Morton was 41-23 as a starter and threw for 11,895 yards for Denver.
“He had a confidence about himself. Kind of a swagger,” Foley said. “Our offense picked up when he arrived. We just knew he could win. He brought that to the team. And man, he had an arm. Oh, yeah. He had a gun.”
Morton was inducted into the Broncos Ring of Fame in 1988 as part of a three-man class along with Haven Moses and Jim Turner. Four years later, he was enshrined in the College Football Hall of Fame.
Morton’s tenure in Denver helped put the Broncos on the map.
“Absolutely, it did,” Foley said. “It made everybody wake up and say, ‘Who is this team on the interior of the United States?’ Unless you played on the East Coast or West Coast, you weren’t getting much coverage.”
Foley said he last saw Morton in the Champions Club at Empower Field during a game sometime in the past two seasons and said he remembered thinking, ‘Man, he looks great.’” Players from the Orange Crush era were surprised and saddened, then, to learn of the quarterback’s passing.
“It’s a little bit shocking,” Foley said. “He was a beautiful guy.”
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Denver, CO
The hippo had to go, but the Denver Zoo slashed its water budget
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DENVER — Zoos are of necessity big gulpers of water, a fact that has some zookeepers in the drying American West working to rapidly upgrade efficiency and reduce unnecessary irrigation or leaks.
Denver Zoo, formally known as the Denver Zoo Conservation Alliance, has rapidly reduced its demands on threatened and declining water sources, including the Colorado River.
Among the upgrades is a sea lion water filtration system that allows most of the water to be cleaned and reused each time the pool is drained. That’s saving more than 8 million gallons a year, zoo sustainability director Blair Neelands said. “You can get in there, scrub it with a toothbrush and refill it with the same water,” she said.
Similar upgrades to an African penguin showcase reduced its water use by 95% by largely eliminating what’s sent down the drain. (Like a backyard swimming pool, though, these tanks sometimes still need to be drained and refreshed with new water to reduce mineral buildup.)
“The biggest thing for us is swapping from dump-and-fill pools to life-support systems,” Neeland said.
Another biggie is replacement of a 50-year-old water main with funding of about $3 million from the city. There’s no way of knowing how much that pipe had leaked over the years, but Neeland suspected it was more than a million gallons a year. The savings should become apparent as the zoo tracks its water use over the next few years.
Creating hippo-sized water savings
When The Arizona Republic visited in 2025, the zoo was on the cusp of eclipsing a goal to reduce its water use by half of what it had been in 2018. The zoo had used 80 million gallons in 2024, or about 219,000 a day, a 45% reduction in just a handful of years. Much of the savings had come in the form of smarter irrigation practices and use of drought-tolerant native plants where possible. The landscaping also pivoted to recycled “purple pipe” water from the city, which owns the zoo’s land, restricting potable water to areas where animals really need it.
“When people hear ‘recycled water,’ they get worried about cleanliness and hygiene,” zoo spokesman Jake Kubié said. “But it’s safe for the animals, and it’s not their drinking water.”
Getting past the water conservation goal would mean draining the pool where Mahali the hippo spent most hours lurking with just his eyes, ears and snout visible to visitors. Because he spent so much time in the pool, the water needed daily changes. It amounted to 21 million gallons a year, not to mention water heater bills that drove the cost to $200,000 a year, according to zoo officials. They estimated that Mahali used as much water as 350,000 four-person households.
“This facility is outdated,” Kubié said. “Some day this will become a huge saver of water.”
That day came before year’s end, and it indeed brought a tremendous savings. The zoo shipped Mahali to a new home (and a potential mate) at a wildlife preserve in Texas and drained the pool one last time. Ending the daily change-outs shaved more than a quarter of the zoo’s entire water usage from the previous year. It put the zoo significantly beyond its goal.
Denver Zoo’s water savings are part of a broader waste- and pollution-prevention effort aimed at being a good neighbor in uncertain times, Neeland said.
“Water savings and drought is top of mind for anyone who lives in the Western United States,” she said.
In Phoenix, a different mix of animals
That’s true of the Phoenix Zoo, as well, where zookeepers must maintain landscaping and animal exhibits in a city that baked under 100-degree-plus high temperatures for a third of the days last year. The zoo creates a “respite in the desert,” spokeswoman Linda Hardwick said, but has no hippos, penguins, grizzly bears or many of the other species that would require big water investments for outdoor swimming or cooling.
“We really specialize in animals that will thrive in the temperatures here,” Hardwick said.
The Phoenix Zoo uses most of its water on landscaping. After a consultant’s 2023 irrigation assessment, the staff centralized irrigation scheduling under a single trained technician and employed technologies including weather-based controllers and smart meters. Salt River Project awarded $70,000 in grant funds for the upgrades and several thousand more for training.
The zoo uses about 189,000 gallons a day, she said. That represents a 17% reduction from 2023, or 20% when adjusted for the year’s particular weather and evapotranspiration demand.
Brandon Loomis covers environmental and climate issues for The Arizona Republic and azcentral.com. Reach him at brandon.loomis@arizonarepublic.com.
Environmental coverage on azcentral.com and in The Arizona Republic is supported by a grant from the Nina Mason Pulliam Charitable Trust.
Follow The Republic environmental reporting team at environment.azcentral.com and @azcenvironment on Facebook and Instagram.
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