Washington, D.C. — A powerful heat dome is spreading across the central United States, bringing dangerously high temperatures, intense humidity, and potentially life-threatening conditions for millions of residents from the Southwest to the Gulf Coast and Great Plains.
Forecasters warned that temperatures could rise above 100°F (37.8°C) in many areas, with around 70 million people under heat advisories as extreme weather continues through the weekend and into next week.
Heat Dome Traps Dangerous Levels of Heat
The extreme conditions are being driven by a heat dome, a weather pattern that occurs when high-pressure air traps hot air near the ground, preventing cooler air from moving in.
Meteorologists said the prolonged heat will be especially dangerous because nighttime temperatures are expected to remain unusually high, limiting the body’s ability to recover from daytime heat exposure.
High humidity levels are also expected to make temperatures feel even hotter, increasing the risk of heat-related illnesses.
National Weather Service meteorologist Bob Oravec said the system is expected to remain in place for several days, creating a long period of dangerous heat across large parts of the country.
Temperatures Could Reach Triple Digits Across Multiple States
The heat wave is affecting a wide region stretching from the desert Southwest to the Gulf Coast, extending into parts of the Midwest and Great Plains.
Some areas are forecast to experience temperatures 10°F to 15°F above average, with possible records expected around parts of Colorado.
Western Nebraska has been placed under an extreme heat warning, with temperatures predicted to reach approximately 108°F (42°C) during the weekend.
Normally cooler states, including parts of Montana and Wyoming, are also expected to see temperatures exceed 100°F (37°C).
Communities Take Steps to Protect Residents
Local authorities across affected regions are preparing measures to help residents deal with the dangerous heat.
In Denver, recreation centers are opening cooling spaces where people can escape high temperatures and access air conditioning.
At the Indianapolis Motor Speedway, organizers are providing water refill stations and cooling areas for visitors attending the Brickyard 400 event.
Officials are urging people to drink plenty of water, avoid prolonged exposure to direct sunlight, and seek air-conditioned locations whenever possible.
Elderly, Children and Vulnerable Groups Face Highest Risks
Health officials warned that extreme heat can be especially dangerous for older adults, children, outdoor workers, and people with existing medical conditions.
Potential risks include heat exhaustion, dehydration, and heat stroke, which can become fatal without quick treatment.
Authorities recommend staying indoors during peak afternoon temperatures, checking on vulnerable family members and neighbors, and using community cooling centers if necessary.
Climate Change Increasing Frequency of Extreme Heat
Scientists say it can be challenging to measure the exact impact of climate change on an individual heat event while it is happening. However, rising global temperatures caused by greenhouse gas emissions are increasing the likelihood of more frequent and severe heat waves.
Climate experts say current weather patterns are consistent with earlier climate projections that predicted hotter temperatures, stronger heat waves, increased humidity, and warmer overnight conditions.
Relief May Be Temporary as Heat Pattern Continues
Forecasters expect some areas of the central U.S. may experience temporary relief later in the week, but the extreme heat could return.
While parts of the Northeast, Mid-Atlantic, and Pacific Northwest are expected to avoid the worst conditions, millions across the central and southern United States remain at risk as the heat dome continues.
