Unravelling Factors: Why World Temperatures Rise and Intense Heatwaves Occur

In recent years, the frequency and intensity of heatwaves have been on the rise, a trend linked to climate change. This phenomenon, known as the greenhouse effect, is caused by the increase in greenhouse gas emissions, including carbon dioxide, methane, and nitrous monoxide, due to burning fossil fuels, agriculture, land use, and various industries since the industrial revolution.

Heatwaves are periods of unusually high temperatures in a specific region, often lasting for several days. One such instance occurred in June 2021, when a six-day long heatwave hit the west coast of the US, with historic high temperatures recorded in seven different states including California, Arizona, and New Mexico. In Canada, temperatures skyrocketed above 49°C in Lytton, British Columbia, and hundreds of wildfires popped up across the country.

The root cause of this global warming is climate change, a significant concern for scientists worldwide. The increased frequency and duration of heatwaves are linked to this change, as are the higher risks of wildfires, especially in dry regions. The increase in the probability of forest fires is primarily due to the drying out of plants and soils during prolonged droughts and heat, making forests more flammable. Human activities such as arson and intensive forestry that weaken forest resilience also contribute significantly, creating a feedback loop where fires release stored CO₂, intensifying the greenhouse effect and further raising temperatures.

The consequences of these extreme temperatures and heatwaves are far-reaching. Droughts will become more common due to increased temperatures and heatwaves, which in turn can make hot temperatures even higher as drier grounds absorb more sunlight. This can lead to higher risks of wildfires, posing a threat to both forests and human settlements.

Moreover, heatwaves have a significant impact on public health, particularly for the elderly and more vulnerable citizens. Mortality rates tend to increase during periods of heatwaves and extreme climate events. It's critical for governments and individuals to prepare measures and safety conditions during summer seasons, as more heatwaves and climate change events become frequent and more intense.

Scientists project that global temperatures will increase at much higher rates in the future as greenhouse gases continue to be released around the world, according to the Climate Science Special Report. This means that heatwaves like the one experienced in June 2021 will become more common by the end of the century, posing a continual threat to our environment and public health.

Atmospheric moisture plays a role in the occurrence of heatwaves. Heatwaves are more frequent in dry conditions, but they can also have a large impact in high humidity conditions. The heat dome, which occurs when high atmospheric pressure moves in and forces warm air downwards, creating a heat dome with air trapped underneath, prevents air from rising, leading to stifling air and increasing temperatures.

In conclusion, the increase in heatwaves and extreme temperatures is a direct result of climate change, a problem that requires immediate attention and action from governments, industries, and individuals worldwide. Preparing for and mitigating the effects of heatwaves and climate change events is crucial to ensuring the safety and well-being of our communities and the preservation of our environment.