Dangerously high temperatures are taking hold in parts of California and Nevada, with triple-digit heat expected through Friday and Saturday, prompting extreme heat warnings and widespread public health advisories. Among the guidance, perhaps most surprising: residents are being told not to drink coffee.
Why authorities are urging people to skip coffee
Meteorologists and health officials, particularly from the National Weather Service (NWS) in Las Vegas, have warned that caffeinated drinks such as coffee and alcoholic beverages can accelerate dehydration during intense heat spells. Instead, residents in the impacted areas are urged to prioritize hydration with water or electrolyte-rich drinks.
This unusual warning comes as heat-related illnesses—including heatstroke and heat exhaustion—are more likely to occur, especially among the elderly, children, those working outdoors, and individuals without air conditioning.
Extreme heat warnings for desert areas
From Friday morning through Saturday evening, extreme heat warnings have been issued for southern Nevada and southeastern California. Forecasts indicate:
- Lake Mead Recreation Area: 104–108 °F (40–42 °C)
- Western Mojave Desert, including Barstow: 100–105 °F (38–41 °C)
- Southern Nevada valleys including Las Vegas, Moapa, and Pahrump: 104–109 °F (40–43 °C)
- Death Valley: temperatures may exceed 115 °F (46 °C)
The NWS Las Vegas emphasized the lethal heat danger inside vehicles, urging residents never to leave pets or children unattended as interior temperatures can spike rapidly.
Advisories extended across California
Further west, central and northern California are also bracing for intense heat, with advisories in effect through Saturday evening.
In northern parts of the state:
- Sacramento Valley and surrounding regions may reach 107 °F (42 °C)
- Trinity, Mendocino, and Lake Counties are forecasted to hit up to 105 °F (41 °C)
In central California, including Merced, Bakersfield, and Tulare, daytime highs could climb to 106 °F (41 °C).
Meteorologists from NWS Sacramento and NWS Hanford stressed that this will be the first significant heat wave of the season beyond Southern California, with strong upper-level high pressure locking in the warmth.
They also warned that despite the air heat, lakes and rivers remain cold, with dangerous temperature gaps of up to 30 °F (17 °C) between the air and water—posing risks of cold shock and hypothermia for swimmers.
First heat wave of the season brings early test
AccuWeather meteorologist Heather Zehr noted that the hot, dry air mass is part of a broader pattern that will likely persist into early June, increasing fire risk and placing additional strain on public health systems.
As this heat wave settles in, residents in the West, especially in California and Nevada, face an early taste of what could be a brutal summer—and are reminded that sometimes even a morning coffee may be better left untouched.
