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Extreme heat can be dangerous to public health

Extreme heat can be dangerous to public health

Authorities and public health specialists in the United States issued warnings about heat to keep people safe as tens of thousand people prepared for even more extreme heat on Monday. The Midwest and East Coast of the United States, as well as much of Southern Europe, experienced temperatures in the 90s Fahrenheit this week.

What are the health risks from extreme heat?

Heat can have a variety of effects on health.

Heat exhaustion can cause a person to feel dizzy, shaken, thirsty, or get a headache. Heat exhaustion is usually not serious, unless a person cannot cool down in 30 minutes.

Heatstroke is a medical emergency that occurs when the core body temperature rises above 40 degrees Celsius.

Heatstroke can cause rapid breathing, confusion or nausea. Heatstroke, if not treated immediately, can cause organ damage or death. Heatstroke is especially dangerous when combined high humidity. This makes it difficult for people to sweat and cool themselves down. Climate change is expected to increase both, since warmer air can hold a greater amount of moisture.

Who is at Risk?

Some populations are more susceptible to extreme heat than others.

Experts are concerned most about the elderly, babies and those who are socially excluded. Also, they are concerned about people who struggle economically and outdoor workers.

Pre-existing conditions such as diabetes, lung disease or heart problems should also make you extra cautious.

Experts believe that more deaths happen earlier in the summer, when bodies haven't had time to acclimatize.

Many countries don't record extreme heat as a cause of death, so statistics on heat-related mortality are considered to be an underestimation.

LESS OBVIOUS RISKS FROM EXTREME HEAT

Extreme heat poses a number of secondary risks. It can test the body's capacity to regulate temperature.

Temperatures that are warmer encourage bacteria and algae growth. Heatwaves increase the risk that water will be contaminated by diseases like cholera or lakes and rivers may become choked with toxic algal growth.

Heat can also cause damage to crops, roads or transport systems.

Air pollution can be dangerously high when wildfires are fueled by trees and shrubs that have dried out.

Heat stress and sleep disturbances caused by heat can also affect mental health.

Climate change will allow disease-carrying insect to spread into new areas, according to medical experts.

Scientists have also mapped out the expansion of Aedes mosquitoes that carry Zika, dengue and chikungunya.

As temperatures rise in California's Central Valley the fungal spores which cause Valley fever, which love deserts, could thrive.

What You Can Do

All across the United States, public health advisories urge people to keep cool, hydrate themselves, and avoid excessive exercise.

Many cities offer free air-conditioned public transportation or public cooling centers.

Employers must ensure that workers are hydrated and have enough breaks. They should also make sure they do not work outdoors in dangerous heat. (Reporting and editing by Kevin Liffey; reporting by Katy Daigle)

(source: Reuters)