USDA's Fire and Food Safety offers useful information to the public.

Generally, saving food that's been in a fire is not a good idea. Food exposed to fire can be compromised by three factors: the heat of the fire, smoke fumes, and chemicals used to fight fire.

Heat from the Fire

​Food in cans or jars may appear to be okay, but if they've been close to the HEAT of a fire, they may no longer be safe. Why? Heat from a fire can activate food spoilage bacteria. If the heat is extreme, the cans or jars themselves can split or rupture, rendering the food unsafe.

Fumes from a Fire

​One of the most dangerous elements of a fire is sometimes not the fire itself, but toxic fumes released from burning materials. Those fumes can kill; they can also contaminate food. 

Chemicals in Fires

​Chemicals used to fight fires contain toxic materials and can contaminate food and cookware. 

Web pages

• Home - https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/emergencies/fires-and-food-safety