02/21/2026
Mold doesn't take the winter off. And yes — it exists in the desert, too. A lot of people assume living in Southern Nevada means they're safe from mold. Dry climate. Low humidity. No problem, right?
Not exactly.
While outdoor mold is less common here than in humid regions, indoor mold is a different story. It thrives anywhere moisture collects — and even desert homes have plenty of those spots.
Here's where it hides:
Bathrooms with lingering humidity after showers. Kitchens where steam accumulates. HVAC systems and air ducts that collect condensation. Evaporative coolers (swamp coolers) that add moisture to the air. Areas with poor ventilation where dampness lingers. Leaky pipes or windows you might not even know about. And those hidden spaces — behind walls, under sinks, in crawl spaces — where moisture quietly builds up. Mold releases spores that float easily through indoor air — and every breath pulls them into your respiratory system.
The symptoms? Persistent nasal congestion. Recurring sinus infections. Coughing that won't resolve. Difficulty breathing or wheezing. Headaches and fatigue.
Here's what makes mold especially tricky: it's often invisible. You might be reacting to something you've never actually seen.
And in winter, when your home is closed up and air recirculates through your HVAC system, mold spores spread easily from room to room.
If your symptoms spike when you're home, get worse in certain rooms, or flare up when your heating kicks on — mold could be the hidden trigger you're not seeing.
Proper testing can identify mold allergies, and addressing moisture sources can help reduce exposure over time. Even in the desert, mold can be the trigger hiding in plain sight.
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