cord in water
furnace in water
The following guidelines should be followed when entering a flooded area with any type of gas and/or electric present: 
  1. Have the utility companies shut off the gas and/or electricity.
  2. Do not touch the fuse box or any plugged-in cords or appliances until the electricity is shut off. Touching these could result in electrocution.
  3. If an electrical appliance motor or any controls are submerged under water do not start it until consulting with the dealer or a service company.
  4. Do not re-light appliances until checked by the gas company. Make sure all pilot lights are on before re-lighting burners.
  5. Do not light matches until the gas is turned off. If there is a gas leak it could cause an explosion.