Heat Dome Brings Extreme Temperatures to More Than 30 States

A dangerous heat dome has enveloped the Midwest, South, and East Coast, bringing extreme heat to more than 30 states this week. The National Weather Service defines a heat wave as a continuous period of abnormally hot weather generally lasting over two days. In the Midwest and the Northeast, three or more consecutive days with temperatures of at least 90 degrees meet that threshold.

The Centers for Disease Control and Prevention states that about 2,000 Americans die each year on average from extreme heat. Groups at greater risk of heat-related illness include babies and young children, overweight people, those 65 years old or older, people who overexert during work or exercise, and those with heart disease or high blood pressure.

People taking medications for depression, insomnia or poor circulation also face elevated risk. The CDC recommends using sunscreen of SPF 15 or higher 30 minutes before going outside and choosing products labeled broad spectrum or UVA/UVB protection.

It also advises drinking extra fluids without waiting until thirsty while avoiding very sugary drinks, alcohol and extra-cold beverages that may cause stomach cramps. Residents should limit time outside to cooler periods such as early morning and evening and avoid leaving children in parked cars even with windows cracked.

Avoiding hot and heavy meals can help reduce the body's overall temperature.

Symptoms of heat stroke include body temperature of 103 degrees or higher, hot red dry or damp skin, fast strong pulse, headache, dizziness, nausea, confusion, passing out and no longer sweating. Symptoms of heat exhaustion include heavy sweating, cold pale clammy skin, fast weak pulse, nausea or vomiting, muscle cramps, feeling tired or weak, headache and passing out.