National Heat Awareness Day

National Heat Awareness Day is an American holiday designed to raise awareness about the negative effects of heat on the human body. It is observed annually on the last Friday of May.

History

The history of National Heat Awareness Day began as an initiative by OSHA and the National Weather Service. While the exact date of the first celebration is unclear, the holiday was created to draw attention to the serious dangers posed by heat.

Each year, temperatures continue to rise. In the U.S., particularly in inland states far from the ocean, high temperatures are common. Prolonged droughts with temperatures soaring above +45ºC create hazardous conditions for those who spend long periods outdoors.

Physical labor in such extreme heat is especially dangerous. Prolonged exposure can result in heat stroke, dehydration, and heat exhaustion. For individuals with chronic heart or vascular conditions, the risks of fainting or even death are significantly heightened.

Interesting Facts

• In hot weather, it is recommended to consume 2.5–3 liters of clean water daily, especially if spending extended periods outdoors.
• The midday sun is the most intense, so it’s advisable to limit outdoor exposure during this time.
• Global warming is a pressing global issue linked to increased emissions of harmful substances, such as carbon dioxide, into the atmosphere.

How to Celebrate

Learn the safety precautions for staying outdoors in hot weather. Familiarize yourself with first aid techniques for heat-related illnesses, including heat stroke, dehydration, and fainting. If you spend a lot of time outdoors, wear hats, apply sunscreen, and drink plenty of water. Avoid sugary carbonated drinks, as they can intensify thirst.

Spread awareness of the holiday on social media. Ask others how they stay safe during extreme heat.

When is National Heat Awareness Day in 2025?

National Heat Awareness Day is observed on the last Friday of May.

Observations