Welcome
I'm sorry to hear about the loss of the shed and it's contents, but as mentioned earlier, stuff can be replaced, A life is gone forever.
I must also say, Don't give up hope of everything being a total loss. Unless if the shed caught fire, and burned to ashes before the fire department arrived, there could very well be a few items that survived.
Heck, even if it was a fire, something could have made it. A few years ago, an animal shelter caught fire and burned to the ground in my area. They could only rescue the dogs, and thought that the cats in the building were all dead, because of the fire's intensity, but for a week after, they were finding pockets of cats in the debries that survived the fire and collapse of the building.