Heat wave fuels wildfire fears in Boulder
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A record-breaking heat wave at the end of March is stoking fears that Colorado could be headed toward drought, heightened wildfire risk and lasting water stress.
Why it matters: Climate experts warn that an unusually dry winter followed by an early-season heat spike is a risky combination — one that could shape not just this summer, but water conditions for years to come.
The latest: A small grass fire broke out Sunday night in Boulder's Chautauqua area, burning about a half-acre before crews contained it. The cause remains under investigation.
- The incident, the second in the area this spring, comes as wildfire risk is rising earlier than usual.
Zoom out: Forecasters held out hope that late-season snow in March and April, typically Colorado's snowiest months, could offset the state's weak winter snowpack.
- Instead, the state just experienced one of its warmest early spring periods in the last 40 years, said Andrew Winters, an assistant professor of atmospheric and oceanic sciences at the University of Colorado Boulder.
- So now, even with an average April moisture-wise, "We're likely looking at being within a drought for a good chunk of the summer," Winters said.
Threat level: Dry grasses and vegetation can ignite easily and allow fires to spread quickly, especially on warm, windy days.
- Even rain now could prove problematic. After extended dry periods, hardened soil can struggle to absorb water, increasing the chance of flash flooding, Winters warned.
- The best-case scenario, he said, would be light rain over an extended period, which could "really allow moisture to soak into the ground."
State of play: Boulder is currently under a drought watch, and will decide by May 1 whether to impose water use restrictions.
- Nearby, Denver Water already enacted mandatory watering limits for the first time in over a decade.
Reality check: If dry conditions persist through April, additional restrictions across the region are likely, Winters said.
- And recovery isn't likely to be quick.
- "Certainly a really good year can help to make up the loss of reservoir levels," he said. "More likely, we would need a series of years strung together to recuperate."
What we're watching: Climate patterns are expected to shift from La Niña to an El Niño, which often brings wetter conditions to Colorado — offering some cautious optimism.
- "There is a little bit of hope that the long-term outlook might favor a bit of a rebound," Winters said. "But nothing is ever guaranteed."