Heat lightning refers to a weather phenomenon characterized by flashes of light from distant thunderstorms, usually occurring without accompanying thunder.

Heat can also refer to high temperature or warmth.

गर्मी

English Usage: The heat of the sun was intense during the midday.

Hindi Usage: दोपहर में सूरज की गर्मी तीव्र थी।

To heat means to cause something to become warm or hot.

गरम करना

English Usage: Please heat the water for tea.

Hindi Usage: कृपया चाय के लिए पानी गरम करें।