What is the threshold for immediate danger when counting seconds from flash to bang during a lightning storm?

The threshold for immediate danger during a lightning storm when counting seconds from flash to bang is less than 30 seconds. This is based on the principle that approximately every 5 seconds between the flash of lightning and the sound of thunder indicates that the storm is about 1 mile away. Therefore, if the count is less than 30 seconds, it signifies that the lightning is within 6 miles, which is considered to be a dangerous proximity.

This understanding is critical for safety, as being too close to a storm increases the risk of lightning strikes and associated injuries. It is essential for individuals in outdoor environments, such as athletes or coaches, to recognize this timeline and take appropriate precautions, such as seeking shelter, when the gap between the flash and the bang decreases to less than 30 seconds.