Rains caused by thunderstorms during the hot weather season (mid-March to mid-June) in Karnataka are called-

The correct answer is Option 2: Mango Showers.

During the hot weather season (mid-March to June), localized thunderstorms accompanied by heavy rain occur in various parts of India. In Karnataka and Kerala, these pre-monsoon rains are popularly known as Mango Showers because they play a crucial role in the early ripening of mangoes.

The other options are incorrect due to regional and climatic variations:

• Kalbaisakhi: These are violent thunderstorms occurring in West Bengal and Assam, not Karnataka.
• Loo: This refers to hot, dry, and oppressive winds blowing in the Northern Plains (Delhi, UP, Bihar) during summer, rather than rain.
• Cherry Blossoms: Also known as Coffee Showers, these occur specifically in coffee-growing regions of Karnataka. However, "Mango Showers" is the standard geographical term used for these pre-monsoon rains across the broader South Indian landscape in this context.