A major weather warning has been issued across large parts of the United States as extreme heat spreads through more than 20 states. Officials are urging residents to stay safe and limit outdoor activity while temperatures continue rising far above normal seasonal levels. Many areas are experiencing conditions that feel more like peak summer than spring.

Weather experts say a powerful “heat dome” is responsible for the dangerous temperatures. This happens when a strong high-pressure system traps hot air over a region and prevents cooler air from moving in. As the heat remains trapped for several days, temperatures continue building and become increasingly dangerous.

Several states are already reporting record-breaking heat. Authorities are especially concerned about older adults, outdoor workers, and people without reliable air conditioning. Emergency officials are encouraging people to stay hydrated, remain indoors when possible, and check on relatives, friends, and neighbors who may be more vulnerable during the heatwave.

The extreme weather is also affecting infrastructure and the environment. Increased use of air conditioning is putting pressure on power grids, while dry conditions are increasing wildfire risk in some regions. Farmers are also facing concerns as soil dries rapidly under the intense heat.

Experts warn that heatwaves like this are becoming more frequent and severe because of long-term climate changes. Officials are asking the public to take the situation seriously by avoiding unnecessary travel and reducing outdoor activities during the hottest hours of the day. The warning serves as a reminder that extreme heat can quickly become dangerous if proper precautions are ignored.