The verbal backspace might have gotten an amused reaction - if their current situation weren't quite so distressing!

"Tsunami!"

He's decoding HTML and associated website coding in his own head as fast as he can to try and put the picture together - which, again, something that would bear much comment if all these things weren't happening so close together - and what Walter can figure out so far isn't pretty.

"We probably aren't even the worst hit..."

Probably, since he can't see what's in front of him.