Why is Kentucky in the United States hot? Causes and heat countermeasures

Kentucky is known for its hot and humid summers. Here, we explain in detail the causes of Kentucky’s heat, heat countermeasures, and places where you can stay cool within the state.

1. Causes of Kentucky’s Heat

1-1. Influence of Humid Subtropical Climate

• Kentucky belongs to the Humid Subtropical Climate zone of the eastern United States, resulting in hot and humid summers.
• Warm and moist air flows in from the south and the Gulf of Mexico, increasing the muggy feeling and making the heat feel more intense.

1-2. Geographical Features

• The western part of the state is relatively flat, while the eastern part is part of the Appalachian Mountains, causing variations in how the heat is felt depending on elevation.
• Heat tends to accumulate in flat areas, while mountainous areas are somewhat cooler.

1-3. Heat Waves and Stationary High Pressure

• When high pressure systems remain stationary for long periods during summer, heat waves occur with continuous hot and humid days.
• High humidity often prevents nighttime temperatures from dropping, increasing the risk of heat-related illnesses.

2. Heat Countermeasures

2-1. Personal Measures

• Frequent hydration: Due to sweating caused by heat and humidity, it is important to consciously replenish water and electrolytes.
• Avoid direct sunlight: Wear hats, use parasols, and wear thin long-sleeved clothing; avoid going outdoors especially between 10 a.m. and 4 p.m.
• Know the signs of heat stroke: Be aware of dizziness, headaches, nausea, fatigue, and take early rest and cooling measures.

2-2. Home and Facility Measures

• Use blackout curtains or blinds to block sunlight from entering indoors.
• Use air conditioners and fans; air conditioners’ dehumidifying function is effective when humidity is high.
• Improve insulation and airtightness to increase cooling efficiency.

2-3. Community and Administrative Measures

• Establish and open cooling centers.
• Develop parks and green spaces to mitigate urban heat island effects.
• Issue heat stroke warnings and provide information to residents.
• Strengthen support for vulnerable groups such as the elderly, children, and those with health conditions.

3. Cool Spots

3-1. Appalachian Mountain High Areas

• The mountainous eastern region (e.g., around Red River Gorge) is at higher elevations and remains cooler even in summer.

3-2. Areas Near Rivers and Lakes

• Regions along the Kentucky River, Ohio River, and around Lake Kentucky feel somewhat cooler due to waterside breezes.

3-3. Forests and State Parks

• Natural areas with abundant shade such as Red River Gorge State Park and Big Sandy State Park are suitable for escaping the heat.

Summary