The heat is something that feels a living being to a high temperature. Physics understands heat as the energy that is transferred from one system to another or from one body to another, a transfer linked to the movement of molecules, atoms and other particles.
In this sense, heat can be generated from a chemical reaction (such as combustion), a nuclear reaction (such as those that take place inside the Sun) or a dissipation (either mechanical, friction, or electromagnetic, microwaves).
It is important to note that bodies do not have heat, but rather internal energy. When a part of this energy is transferred from one system or body to another that is at a different temperature, we speak of heat. The transfer of heat will occur until the two systems are at the same temperature and the so-called thermal equilibrium is reached.
According to DigoPaul, the amount of heat energy that is transferred is calculated and expressed in calories. This unit of measurement (unofficial) reflects the amount of energy required to raise, from 14.5º to 15.5º Celsius, the temperature of one gram of H2O (water). In the International System of Units, the unit of energy is known as the joule. One calorie is equivalent to 4,184 joules.
There are other uses of the term heat, usually related to a symbolic sense. The heat can be, therefore, synonymous with arousal and exaltation (for example, “The heat of the public was felt in the stadium”) or refer to the most intense of an action (“His clothes were torn in the heat of the battle ”).
Certain consequences of global warming
Without a doubt, the clearest consequence of global warming is the increase in the average temperature of the planet, a phenomenon that we have witnessed in recent decades. Also, the sea level has risen considerably, threatening dangerous floods.
All of this could affect health, causing an increase in the average number of people affected by respiratory and cardiovascular diseases, as well as infections caused by tropical insects and dehydration. The first group of conditions mentioned would take place since, due to the heat, the effort required to carry out any physical activity would increase, with the consequent pressure on the lungs and the circulatory system.
With regard to mosquitoes and the rest of the pests, since the tropical areas would expand, diseases such as dengue, yellow fever, cholera and malaria would affect a greater percentage of the world population.
The magnitude and frequency of rainfall would be higher, although the water level in rivers and lakes would decrease, given the greater evaporation caused by high temperatures. Certain droughts throughout the year could affect the productivity of generating energy supply. On the other hand, naturally, the demand for drinking water would increase, to fight against the heat. This demand, however, could not be satisfied.
Another possible consequence of excessive evaporation would be that soils lose their moisture; this would cause many areas rich in vegetation to become deserts. The loss of plants and nutrients would logically be followed by a decrease in livestock activities, with its impact on the economy.
Floods, on the other hand, would not only bring massive evacuations, but the sea water would salinize certain rivers and cause an increase in the erosion of coastal buildings, which would threaten their foundations. In turn, sunlight would not reach the bottom of reefs as easily, and this would directly affect the photosynthesis process of certain species that are essential for coral life, one of whose functions is to moderate the waves.