A scorching heatwave is set to grip a significant portion of the United States as a major heat dome settles over the region through late July. Forecasts indicate that over 100 million Americans will experience daily "feels-like" temperatures exceeding a sweltering 100°F (38°C). This prolonged period of intense heat poses considerable risks to public health and infrastructure.

Temperature forecasts show daytime highs soaring 5–15°F (3–8°C) above average for many areas. The presence of high humidity, exacerbated by what's known as "corn sweat" (evapotranspiration from cornfields), will further intensify the perceived heat, making conditions particularly oppressive. Nighttime temperatures are also expected to remain stubbornly high, hovering near 80°F (27°C), offering little respite from the daytime heat.

The heat dome's influence extends beyond just high temperatures. Its edges are predicted to become breeding grounds for intense thunderstorms and the potential for flash flooding. This combination of extreme heat and severe weather adds complexity to the situation, requiring residents to be vigilant and prepared for multiple hazards.

A heat dome is essentially a persistent high-pressure system that traps warm air underneath it. The air descends and compresses, further heating it up. This phenomenon can lead to prolonged periods of extreme heat, as the system tends to remain stationary for days or even weeks.

The exact areas affected by the heat dome may shift over time, but current forecasts suggest that the central and eastern United States are most at risk. Major cities and agricultural regions could face significant challenges due to the sustained high temperatures.

With such extreme heat expected, it's crucial to take precautions to protect yourself and others. Here are some essential safety tips:

Drink plenty of water throughout the day, even if you don't feel thirsty.

Avoid strenuous activities during the hottest parts of the day. If you must be outside, take frequent breaks in shaded or air-conditioned areas.

Opt for loose-fitting, light-colored clothing to help your body stay cool.

Pay special attention to the elderly, children, and those with chronic health conditions, as they are more susceptible to heat-related illnesses.

Temperatures inside a car can quickly reach deadly levels, even with the windows slightly open.

Be aware of symptoms such as dizziness, headache, nausea, rapid heartbeat, and confusion. Seek medical attention immediately if you experience any of these symptoms.

In addition to the heat, the risk of flash flooding along the heat dome's edges necessitates preparedness. Here are some steps you can take:

Stay informed about the latest weather updates and alerts.

Determine if you live in a flood-prone area.

Develop a family emergency plan that includes evacuation routes and meeting points.

Include essential supplies such as water, food, medication, and a flashlight.

Turn around, don't drown. Just six inches of moving water can sweep a person off their feet, and a foot of moving water can carry away a car.

The impending heat dome and associated weather risks require proactive measures and a commitment to safety. By staying informed, taking precautions, and looking out for one another, communities can mitigate the potential impacts of this extreme weather event.