Given that all of Faeruns Dragons are suffering from a never ending Dragon Rage did Maaril revoke his "Visting rights" for those Dragons that hes allowed into to Waterdeep?
This is the problem with "Realms Shattering Events" - they have to be applied Faerűn-wide. I'd postulate that the Dragonward being an epic spell (it is, trust me) is just as powerful as the elven High Magic/mythal that is linked to the dragon Rage (although I'm still intrigued as to how that's all going to gel together ...) and hence any dragons inside the Dragonward are immune to the Rage. At least that'll be what happens in MY Realms.
-- George Krashos
"Because only we, contrary to the barbarians, never count the enemy in battle." -- Aeschylus
Also, it seems that the Rage is spreading outward from a given source. We may have to read the last book to find out the intensity of the Rage as far out as Waterdeep.
Waterdeep is probably the safest place on Faerun during the Year of Rogue Dragons, its the one place a flight of rampaging Dragons cant touch
*smirk*
Can't you just picture it? Outside Waterdeep dozens of slavering Chromatic Dragons try in vain to enter waterdeep.. Lining Waterdeeps walls stand its citizens, many with their pants down Mooning the enraged Dragons!