Hydrogen in gas form is non-toxic. It is non fragrant, color and tasteless. Unlike, for example, LPG, it is much lighter than ordinary air, so that it rises quickly. The auto-ignition temperature is much higher than, for example, for LPG, petrol or diesel. The risks in a vehicle fire with the last mentioned fuels are therefore higher than with hydrogen.
The pictures below show the effects of a fire in a hydrogen car and a fire in a car on gasoline.