Why Is Illinois, USA, So Hot? Causes and Heat Countermeasures

Why Is Illinois, USA, So Hot? Causes and Heat Countermeasures

Causes of Heat in Illinois

1. Humid Continental / Humid Subtropical Climate

• Illinois belongs to a humid climate zone, tending to be hot and humid in the summer.
• High humidity often makes the temperature feel hotter than it actually is, intensifying the muggy sensation.

2. Influx of Warm, Moist Air from the Gulf of Mexico

• During summer, warm and moist air from the Gulf of Mexico flows into the Midwest, affecting Illinois as well.
• This moist air causes the muggy heat and increases the risk of heat-related illnesses.

3. Urban Heat Island Effect

• In large cities such as Chicago, asphalt and buildings absorb and retain heat, causing the urban heat island effect.
• This phenomenon causes urban areas to be several degrees warmer than suburban or rural areas, especially at night.

Heat Countermeasures

1. Use of Air Conditioning

• Air conditioning is commonly used in homes, workplaces, and public facilities, helping to prevent heatstroke during extreme heat.
• Renovations to improve building insulation are also progressing.

2. Public Cooling Centers

• Local governments operate cooling centers, which provide safe spaces especially for the elderly and people with health issues during heat waves.

3. Personal Lifestyle Adjustments

• Avoid going outside during the hottest times of the day.
• Wear hats, use parasols, and choose breathable clothing.
• Stay well hydrated and maintain salt intake.
• Use fans and portable cooling devices, which are increasingly popular.

Relatively Cooler Spots Within Illinois

1. Lakeside and Riverside Areas

• Areas along Lake Michigan in Chicago and near the Illinois and Mississippi Rivers benefit from cooling breezes from the water.
• Temperatures near lakes and rivers tend to be somewhat lower, easing the muggy heat.

2. Forests and Parks

• State parks and forested areas (such as Shawnee National Forest) offer shady spots and natural breezes that feel cooler.
• These areas serve as recreational and retreat spots during summer.

3. Suburbs and Higher Elevations North of Chicago

• Suburban and slightly higher-elevation areas north of Chicago can feel a bit cooler than the urban core.

Summary

Note

Summers in Illinois are hot and humid, increasing the risk of heatstroke. Especially the elderly, children, and those with pre-existing conditions should take extra care and spend time in cooler environments.