Introduction:
The hot and dry winds that blow in the Northern Plains are known as "Loo". These winds are a characteristic feature of the Indian subcontinent and are experienced during the summer months. Loo winds are known for their high temperatures and low humidity, making them uncomfortable for people living in the affected regions.

Main Body:

1. Definition of Loo:
Loo is a type of wind that blows across the Northern Plains of India and neighboring countries during the summer season. It is characterized by its hot and dry nature, which can cause discomfort and health issues for individuals exposed to it.

2. Origin of Loo:
Loo winds are primarily caused by the intense heating of the land surface during the summer months. As the sun heats up the ground, the air above it also gets heated. This hot air rises and creates a low-pressure area. To balance this pressure difference, cooler air from surrounding regions rushes in, resulting in the formation of Loo winds.

3. Characteristics of Loo:
Loo winds are known for their distinct features, which include:

- High temperatures: Loo winds bring scorching heat to the affected regions, causing the mercury to rise significantly. These hot temperatures can be quite uncomfortable, especially during the peak summer months.

- Low humidity: Loo winds are dry in nature, with very low humidity levels. This lack of moisture in the air can lead to dehydration and skin-related problems for individuals exposed to these winds.

- Dust and sandstorms: Loo winds often carry dust and sand particles, which can reduce visibility and create a hazy atmosphere. These dust storms can also cause respiratory issues for people with allergies or respiratory conditions.

Conclusion:
Loo winds are an integral part of the summer climate in the Northern Plains. While they bring intense heat and dryness, they also have an impact on the local environment, agriculture, and human health. Understanding the characteristics and effects of Loo winds is essential for the people living in these regions to take necessary precautions and protect themselves from the adverse effects of these hot and dry winds.