A dangerous heat dome is building over a large portion of the United States, putting over 100 million people at risk of experiencing temperatures of 100°F (38°C) or higher this week. This prolonged period of extreme heat poses significant health risks, especially for vulnerable populations such as the elderly, children, and those with chronic illnesses.

A heat dome is a persistent high-pressure system that traps hot air over a region. The sinking air associated with high pressure compresses and heats up, leading to prolonged periods of scorching temperatures. This phenomenon can last for days or even weeks, creating dangerous conditions.

The current heat dome is expected to impact a wide swath of the country, including the Midwest, the South, and parts of the East Coast. Cities like Chicago, St. Louis, Dallas, Atlanta, and Philadelphia are all under threat of experiencing record-breaking temperatures. Many areas are already under heat advisories and excessive heat warnings.

Extreme heat can lead to a variety of health problems, including:

Symptoms include heavy sweating, weakness, dizziness, headache, nausea, and vomiting.

A life-threatening condition characterized by a high body temperature (104°F or higher), confusion, seizures, and loss of consciousness.

Occurs when the body loses more fluids than it takes in.

Heat can worsen conditions like heart disease, respiratory problems, and diabetes.

Here are some tips to stay safe during this extreme heat event:

Drink plenty of water throughout the day, even if you don't feel thirsty. Avoid sugary drinks and alcohol, which can dehydrate you.

Spend as much time as possible in air-conditioned environments, such as shopping malls, libraries, or cooling centers.

Avoid strenuous activities during the hottest part of the day (typically between 10 a.m. and 4 p.m.). If you must be outside, wear light-colored, loose-fitting clothing and a wide-brimmed hat.

Cooling off with water can help lower your body temperature.

Make sure to check on elderly neighbors, friends, and relatives who may be more susceptible to heat-related illnesses.

The temperature inside a car can rise rapidly, even on a mild day, and can be fatal. Never leave children or pets in cars.

The increasing frequency and intensity of heat waves are a clear sign of climate change. As the planet continues to warm, extreme heat events are likely to become more common and more severe, posing a significant threat to public health and infrastructure.

Stay informed about the latest weather forecasts and warnings from your local National Weather Service office. Prepare your home and family for extreme heat by stocking up on water, food, and other essential supplies. By taking these precautions, you can protect yourself and your loved ones from the dangers of this heat dome.