Millions of Americans were told to cut out coffee as heat-related warnings took effect across 11 states on Monday, and the National Weather Service (NWS) predicted “dangerously hot conditions” in some parts of the U.S.
The NWS advised avoiding drinking alcohol and caffeine, which can speed up dehydration. Instead, it suggested drinking plenty of water or electrolyte-filled sports drinks, using sunscreen, and wearing light-colored, loose-fitting clothing.
Why It Matters
According to the Centers for Disease Control and Prevention (CDC), extreme heat can lead to heat-related illnesses, especially in older adults, young children and those with chronic medical conditions.
Symptoms may include heavy sweating, muscle cramps, dizziness and nausea. The CDC says more than 700 people die each year in the U.S. because of extreme heat.
Additionally, rising temperatures can worsen ground-level ozone pollution, which presents additional health risks.
What To Know
Extreme heat warnings—which the NWS issues when “extremely dangerous heat conditions are expected or occurring”—were in place for northwest and southeast California, southern Nevada, and southwest Oregon, as well as parts of Arizona and Utah.
For California and Oregon, the NWS said high temperatures in the triple digits, including up to 110 degrees in western Siskiyou County’s valleys would be possible.
Temperatures around 110 degrees would also be possible in Utah’s lower Washington County and Zion National Park.
In Arizona, the NWS said lower elevations of the Grand Canyon could see daytime temperatures up to 115 degrees, while Las Vegas, Nevada, could expect highs between 110 and 115.
Death Valley, often referred to as the hottest place on Earth, was forecast to see highs between 120 and 125.
Meanwhile, less severe heat advisories had been issued for parts of Washington, Idaho, Louisiana, Mississippi, Florida, and Georgia.
Heat index values, which reflect how hot it feels when humidity is taken into account, could hit triple digits in many of these areas, the NWS said.
What People Are Saying
NWS Eureka, California said on X, Friday: “Hot temperatures are forecast for the interior in the coming days. Heat Advisories and Extreme Heat Warnings have been issued across the interior portions of the area. Slightly cooler (but still hot!) temperatures are possible by Tuesday.”
NWS Tallahassee, Florida said on X, Monday: “5 a.m. ET July 14, 2025: A Heat Advisory is in effect this afternoon for all of our Florida counties and portions of southern Georgia. Heat Indices are forecast to climb to between 108° to 112° in these areas with 104° to 107° elsewhere with highs between 94°-98°.”
What Happens Next
At the time of writing, the latest extreme heat warning was in place until Wednesday evening.
Regular forecast updates are issued by the NWS on its website and social media channels.
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