Heat Waves

Diagram Description automatically generatedSkye Worland 

Period:1st

Heat Waves

                                                HEAT WAVES

Definition:

A period of prolonged abnormally high temperatures relative to those normally expected. 

o   Very serious and dangerous

 

Problem 

Prolonged exposure to excessive heat can damage crops, injure or kill livestock, and increase the risk of wildfires. 

 

Data

During the 1960s, the average heat wave across 50 cities was 2.0°F above the local 85th percentile threshold. During the 2010s, the average heat wave has been 2.5°F above the local threshold.

 

Causes:

High pressure in the atmosphere moves in and pushes warm air toward the ground. The high pressure is a result of air sinking through the atmosphere. As the air descends, the pressure increases, compressing the air and heating it up.

 

o   The sinking air acts like a cap. It traps warm ground air in place. 

 

Global Warming     More heat waves

Climate change is making heat waves longer, more extreme, and more frequent.

 

Leading cause of weather- related deaths 

o   Kills more than 600 people a year

o   High-impact marine heatwaves attributable to human-induced global warmingcan make existing health problems worse and can cause heat stroke or heat exhaustion even in healthy people.

 

Reduce Health Toll

Cities can offer community cooling centers, warn the public when a heat wave is coming, and improve infrastructure to avoid power outages and ensure access to water.

figure of a high-pressure system causing a cap and trapping air to make a heat wave.

 

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