ONE OF THE MAJOR HAZARDS IN STORES IS RELATED TO

I would imagine fire hazards to be the more crucial.

My answer will be FIRED <<<<<<<<<<<<<<<<

Fire can damage the store in a way, that no one can dream and it's occurrence may be frequent, particularly where goods are of flammable nature. But other three factors, may occur and damage goods. But there occurrence relates to unusual events.

Floods

Arson attack

In case of gas connection given in warehouse, care must be taken and proper ventilation should be considered.

Fire the major and water the most common hazard. 

I believe that fire is one of the most factors, because it had a gross loss and damage for all the business not only goods .

Fire and water are2 major hazards in store,

1) FIRE

is far beyond any hazards in stores specially out of electric and electronic systems.

The greatest and most uncontrollable hazard in stores is fire hazard

Accidents related to the fire are one of the biggest dangers due to their capacity for destruction, both of material goods as of people and can cause irreparable damage. Thus attention is given and special training for fire fighting in workplaces.

FIRE ..................... MOST, NATURAL CALAMITIES ...............WATER.