Thursday, July 11, 2025 — NEW YORK, 8:45 AM EDT — A dangerous heat advisory is in effect across Northern Nevada today, as a wave of extreme temperatures continues to bake the region. Cities like Reno, Sparks, and Carson City are bracing for another day of intense heat, with temperatures climbing well into the triple digits.
Scorching highs across Reno and surrounding counties
Forecasts are calling for highs around 105°F (40°C) in Reno and surrounding areas, with spots in Churchill, Pershing, and Lyon counties likely to hit 108°F (42°C) before the day is over. These values are far above normal for this time of year, creating heightened risks for heat-related illness, especially for those without access to adequate cooling.
Excessive heat warning continues through Friday
The National Weather Service has extended its excessive heat warning through Friday evening, warning of dangerously hot conditions and warm overnight lows that will offer little overnight relief. Temperatures are expected to remain near 75°F (24°C) even after sunset in metro areas like Reno and Sparks, further straining health and energy systems.
Persistent heat dome driving the extreme weather
At the center of the ongoing heatwave is a stubborn ridge of high pressure—a so-called heat dome—that has parked itself over the Great Basin. The system is acting like a lid, trapping heat at the surface and pushing temperatures across Northern Nevada, Eastern California, and parts of Southern Oregon into record-challenging territory.
Urban zones like Carson City feeling the worst of it
Urban centers such as Carson City and Fernley are experiencing intensified heat effects due to the urban heat island phenomenon, where paved surfaces and buildings absorb and radiate heat throughout the day and night. Combined with minimal greenery and limited air movement, the effect is a punishing blanket of heat over the city.
Low winds, dry air elevate wildfire danger
Light winds—generally below 10 mph—and very low humidity around 10% are doing little to ease the heat. In fact, the dry air is increasing the fire danger in areas along the Sierra Front and across the Nevada desert, where vegetation is crisp and conditions are primed for rapid fire spread.
More extreme heat on the horizon
Looking ahead, hot and dry weather is expected to continue into the weekend, with only modest signs of a cooldown by early next week. For now, much of Northern Nevada remains under heat-related advisories, and meteorologists expect the extreme conditions to linger through at least Sunday.
