The United States is bracing for an intense heatwave that will affect millions of people across the country. Meteorologists are warning of a heat dome that will bring unusually high temperatures and prolonged heat, posing significant risks to public health and safety.

The heatwave is expected to begin this weekend and persist for at least a week, with some areas experiencing its effects until the end of the month. Temperatures are projected to be 15 to 25 degrees Fahrenheit higher than normal, both during the day and at night. This prolonged heat is particularly concerning as it can exacerbate existing health issues and increase the risk of wildfires.

The Heat Dome: A Vast and Powerful Weather Phenomenon

A heat dome occurs when a high-pressure system traps hot air, acting like a lid and preventing cooler air and rain from moving in. This current heat dome is expected to cover a vast area, potentially affecting two-thirds of the continental United States. Initially centered over the Northern Plains, it is likely to shift and expand, possibly reaching from coast to coast over the next 10 days or more.

Forecasters are predicting record-breaking temperatures in several states, including Nevada, Utah, Colorado, Wyoming, Idaho, Montana, North Dakota, and South Dakota. The National Weather Service anticipates that more than 90 local temperature records could be tied or broken by the middle of the week, with two-thirds of these being overnight heat records. These elevated nighttime temperatures are particularly dangerous as they hinder the body’s ability to recover from the day’s heat.

Record-Breaking Nighttime Heat

One of the most alarming aspects of this heatwave is the expected record-breaking nighttime temperatures. In cities like Fort Lauderdale, Miami, Tampa, Galveston, and Charleston, temperatures are not expected to drop below 80 degrees Fahrenheit. This lack of cooling at night can be just as dangerous as the daytime heat, as it prevents the body from getting the relief it needs.

In the Southeast, while daytime temperatures may not be as extreme due to increased moisture and humidity, nighttime heat could reach record levels. This unusual pattern is due to the heat dome’s influence on weather systems in the region.

The Impact of Climate Change

Experts agree that climate change is playing a significant role in the intensity and duration of this heatwave. The burning of fossil fuels has contributed to a long-term warming trend, making heatwaves more intense, longer-lasting, and covering larger areas. According to Climate Central, a 20,000-square-mile swath of the country from Southern California to northern Minnesota, where 24 million people live, will experience warmth that is at least five times more likely due to climate change.

Using attribution science experts have determined that the temperatures forecasted for this heatwave would be virtually impossible without the influence of climate change. This underscores the urgent need for action to mitigate the effects of global warming.

Increased Wildfire Risk

The prolonged heat and drought conditions are also raising concerns about wildfires. Dry soil and air moisture levels are exacerbating the heat, creating a vicious cycle that worsens drought conditions and increases the risk of wildfires. This is particularly concerning given the already active wildfire season.

The North American monsoon is expected to bring some relief in the form of thunderstorms, which could help ease dryness in some areas. However, these storms also pose hazards such as gusty winds, blowing dust, lightning, and potential wildfire starts. Early-season monsoon storms can be unpredictable, with some areas receiving heavy rain while others experience mostly dry thunderstorms.

Safety Tips for the Heatwave

As the heatwave approaches, it is crucial for individuals to take precautions to protect themselves and their loved ones. Authorities advise drinking plenty of non-alcoholic fluids, staying out of the sun during the warmest times of the day, and seeking shelter in air-conditioned spaces if possible. It is also important to check on at-risk friends, relatives, and neighbors.

Children and pets should never be left in a parked vehicle, even with the windows cracked, as temperatures can quickly reach deadly levels. By taking these precautions, individuals can reduce the risk of heat-related illnesses and stay safe during the extreme heat.