There is a gap at the bottom of the kitchen door. Will the weather leak explode?

There is a gap at the bottom of the kitchen door, so water leakage will not cause an explosion. According to the query of relevant websites, natural gas explosion needs to meet three conditions: indoor natural gas concentration reaches the explosion limit (5% to 15%). In a relatively closed space, gas hardly circulates. Natural gas meets open flames, electric sparks and other substances.