Explosion from hydrogen? Not a problem at all - hydrogen is MUCH MUCH safer than gasoline.<p>The main reason for that is that it doesn&#x27;t stick around - it&#x27;s lighter than air, so all the fuel rises instantly, and so does the bulk of the fire, which stays with the fuel.<p>It makes hydrogen fires rather safe as fires go - they are out within seconds.<p>For example the hydrogen fire in the Hindenburg was out within about 10 to 15 seconds. The casualties came from burning fabric and other things (like crashing).<p>Hydrogen is not a good fuel for other reasons (see my other post), but not because of safety.