Extreme Heat | Ready.gov (2024)

Prepare for Extreme HeatBe Safe During Heat-Related IllnessesSummer Break Associated Content

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If you are a disaster survivor, please visit FEMA.gov for up-to-date information on current disaster declarations. If you have questions about your disaster assistance application, you can call (800) 621-3362, visit disasterassistance.gov or use the FEMA mobile app.

There is hot, and then there is hot! Extreme heat is a period of high heat and humidity with temperatures above 90 degrees for at least two to three days. In extreme heat your body works extra hard to maintain a normal temperature, which can lead to death. Extreme heat is responsible for the highest number of annual deaths among all weather-related hazards.

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Older adults, children and sick or overweight individuals are at greater risk from extreme heat.

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Humidity increases the feeling of heat.

Prepare for Extreme Heat

  • Learn to recognize the signs of heat illness.
  • Do not rely on a fan as your primary cooling device. Fans create air flow and a false sense of comfort, but do not reduce body temperature or prevent heat-related illnesses.
  • Identify places in your community where you can go to get cool such as libraries and shopping malls or contact your local health department to find a cooling center in your area.
  • Cover windows with drapes or shades.
  • Weather-strip doors and windows.
  • Use window reflectors specifically designed to reflect heat back outside.
  • Add insulation to keep the heat out.
  • Use a powered attic ventilator, or attic fan, to regulate the heat level of a building’s attic by clearing out hot air.
  • Install window air conditioners and insulate around them.
  • If you are unable to afford your cooling costs, weatherization or energy-related home repairs, contact the Low Income Home Energy Assistance Program (LIHEAP) for help.

Be Safe DURING

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  • Never leave people or pets in a closed car on a warm day.
  • If air conditioning is not available in your home go to a cooling center.
  • Take cool showers or baths.
  • Wear loose, lightweight, light-colored clothing.
  • Use your oven less to help reduce the temperature in your home.
  • If you’re outside, find shade. Wear a hat wide enough to protect your face.
  • Drink plenty of fluids to stay hydrated.
  • Avoid high-energy activities or work outdoors, during midday heat, if possible.
  • Check on family members, older adults and neighbors.
  • Watch for heat cramps, heat exhaustion and heat stroke.
  • Consider pet safety. If they are outside, make sure they have plenty of cool water and access to comfortable shade. Asphalt and dark pavement can be very hot to your pet’s feet.

Heat-Related Illnesses

Know the signs of heat-related illnesses and ways to respond. If you are sick and need medical attention, contact your healthcare provider for advice and shelter in place if you can. If you are experiencing a medical emergency call 9-1-1.

Get more detailed information about heat-related illnesses from the CDC and National Weather Service.

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HEAT STROKE

  • Signs:
    • Extremely high body temperature (above 103 degrees F) taken orally
    • Red, hot and dry skin with no sweat
    • Rapid, strong pulse
    • Dizziness,confusion or unconsciousness

If you suspect heat stroke, call 9-1-1 or get the person to a hospital immediately. Cool down with whatever methods are available until medical help arrives. Do not give the person anything to drink.

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HEAT CRAMPS

  • Signs:Muscle pains or spasms in the stomach, arms or legs

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HEAT EXHAUSTION

  • Signs:Heavy sweating, paleness, muscle cramps, tiredness, weakness, fast or weak pulse, dizziness, headache, fainting, nausea, vomiting

If you have signs of heat cramps or heat exhaustion, go to a cooler location and cool down by removing excess clothing and taking sips of sports drinks or water. Call your healthcare provider if symptoms get worse or last more than an hour.

Summer Break

While the kids are home for the summer, get the whole family prepared.

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  • Make a family communication plan and include the whole family.
  • Practice evacuation plans and other emergency procedures with children on a regular basis.
  • Teach kids when and how to call important phone numbers like 9-1-1.
  • Make sure the kids have an emergency contact person and know how to reach them.
  • Create a family password or phrase to prevent your child from going with a stranger.
  • Keep the kids occupied with online emergency preparedness games.
  • Download the free Prepare with Pedro activity book to help kids learn to prepare.
  • Decide on a family meeting place you can go if separated.

Associated Content

Extreme Heat | Ready.gov (2024)

FAQs

What temperature is considered a heat emergency? ›

Patients with heatstroke have a complete loss of thermoregulation, a core temperature greater than 40.5 degrees C (105 degrees F) and impaired mental status. These critically ill patients must be cooled quickly to 39 degrees C (102 degrees F) to avoid devastating complications.

Can you be forced to work in extreme heat? ›

While there are no specific federal regulations about working in extreme cold or heat, you do have a right to a workplace “free from recognized hazards .” That includes exposure to extreme cold and heat. Some states do have more rigorous rules regarding heat, and you can find the state plans here .

What are the OSHA rules on extreme heat? ›

According to the new standards, all indoor places of employment where the temperature reaches 82 degrees Fahrenheit or above must comply with regulations around access to water, cool-down areas, acclimatization, training, and more.

What is considered to be extreme heat? ›

In most of the United States, extreme heat is a long period (2 to 3 days) of high heat and humidity with temperatures above 90 degrees.

At what temperature should you put your furnace on emergency heat? ›

The Emergency Heat or Auxiliary Heat setting is the second stage of your heating system that is used when the temperature is too low for the heat pump to be able to remove heat from outside, typically below 35 degrees Fahrenheit.

Can I run emergency heat overnight? ›

So, to sum up everything that we just covered, emergency heat is not supposed to run the way that your regular heat setting does—and it is especially not meant to run all day and night during the long, frosty winter months.

What temperature can you refuse to work in the US? ›

OSHA does not set specific temperatures at which workers can refuse to work. However, workers have the right to refuse work that they believe poses an imminent danger of death or serious harm, including unsafe heat conditions.

Can I sue my job for it being too hot? ›

It's illegal for your employer to retaliate against you (such as fire you) for reporting heat hazards that threaten your safety or health. So while you may not necessarily be able to walk out of work, you could have a legal claim against your employer.

What temperature is legally too hot to work inside? ›

Employees who work in traditional office environments have a lower risk of indoor heat exposure, and although there is no standard related to indoor office temperature, the OSHA technical manual recommends employers maintain workplace temperatures in the range of 68-76 degrees Fahrenheit and humidity control in the ...

How often should you take a break when working in the heat? ›

When the temperature equals or exceeds 95 degrees, employers must provide one 10-minute "preventative cool-down rest period" every 2 hours. During the first 8 hours of a shift, the cool-down periods may be provided at the same time as the rest periods.

Is temperature an OSHA violation? ›

OSHA has no regulations specifically addressing temperature and humidity in an office setting. However, Section III, Chapter 2, Subsection V of the OSHA Technical Manual, "Recommendations for the Employer," provides engineering and administrative guidance to prevent or alleviate indoor air quality problems.

How long can you be outside in 100 degree weather? ›

Limit outdoor exercise to 30 minutes at a time.

Even if you're a seasoned athlete, you should not exercise in temperatures that feel higher than 100 degrees Fahrenheit.

What temperature is too hot for humans? ›

What is the heat index?
ClassificationHeat IndexEffect on the body
Danger103°F - 124°FHeat cramps or heat exhaustion likely, and heat stroke possible with prolonged exposure and/or physical activity
Extreme Danger125°F or higherHeat stroke highly likely
2 more rows

How hot is too hot for health? ›

Researchers investigated when the body starts exerting more energy to keep itself cool at high temperatures. They found that this upper-temperature limit lies between 40℃ (104F) and 50℃ (122F) when the human body stops functioning optimally.

How much heat is too much for a human? ›

- Normal core body temperature is around 98 degrees Fahrenheit, but running in the heat on average will bring that up to between 101 and 103 degrees Fahrenheit. Remember, once you hit 104, you're at risk for heat stroke.

Can you get heat stroke in 80 degree weather? ›

“Generally, caution should be taken if the heat index is over 77 degrees (Fahrenheit). Above 82 degrees is considered 'extreme caution' — heat-related illness is possible with long exposure. Over 85 is dangerous — heat illness is likely and heat stroke is possible.

What temperature is high enough for ER? ›

Numbers that are cause for concern: 105°F – Go to the emergency room. 103°F or higher – Contact your health care provider. 101°F or higher – If you're immunocompromised or over 65 years of age, and are concerned that you've been exposed to COVID-19, contact your health care provider.

What temp is considered heat exhaustion? ›

In heat exhaustion, your body temperature may rise to 101°F (38.3°C) to 104°F (40°C). This can make you feel weak and dizzy. Your heart may not be able to pump enough blood.

How do I know if I have emergency heat? ›

Thermostat. Emergency Heat should be listed under Equipment. If it is, it will say Off or On. There should also be Emergency heat type and Emergency heat source listed under "System details."

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