The point is that hurricanes are arguably a less difficult emergency to manage – they are predictable, understood and come with plenty of notice, to the point that individual preparation is both possible and effective.
This doesn't mean that centrally-coordinated emergency response isn't still useful – merely that it's not unreasonable for it to cost more to prepare for a rare and unpredictable emergency than a more frequent but predictable one.
>Terrorism can strike without warning and the same preparations for terrorism would help in disasters like the blast in Beirut.
If you live in the US you live in a war-faring nation, that is in constant conflict, at home or abroad. To say it can strike at anytime unexpectedly is hard to believe when we instigate it perpetually.
Hurricanes are not only well understood, they are also something that every single citizen living in a coastal city knows is inevitable and frequent enough that they take the precautions personally for dealing with them.
They also strike with anticipation, so after you've secured your personal property and made sure you haven't built in a flood plain like a responsible citizen, you have plenty of time to evacuate if/when one is going to make landfall where you live.
Terrorism can strike without warning and the same preparations for terrorism would help in disasters like the blast in Beirut.