Answer: tsunami

AnswerCrossword Clue
TSUNAMI

Destructive wave

TSUNAMI

Macro wave?

TSUNAMI

Powerful wave

TSUNAMI
Seaquake consequence
TSUNAMI
Dangerous wave
TSUNAMIFlooding cause
TSUNAMIWest Coast ocean concern
TSUNAMICoastal flooding cause
TSUNAMIEarthquake consequence
TSUNAMIWord on an "evacuation route" sign
TSUNAMIIt's often wrongly called a "tidal wave"
TSUNAMIEnormous sea wave
TSUNAMISeaquake aftermath
TSUNAMICoastal disaster
TSUNAMIIndian Ocean disaster of 12-26-04
TSUNAMIDanger originating in the Ring of Fire
TSUNAMIReally big wave
TSUNAMIRing of Fire danger
TSUNAMIQuake consequence
TSUNAMIQuake danger
TSUNAMITidal wave
TSUNAMISalt shaker
TSUNAMIEarthquake aftermath, perhaps
TSUNAMILiterally, "harbor wave"
TSUNAMIHuge wave
TSUNAMIWave of terror
TSUNAMIEnormous wave
TSUNAMIResult of a seaquake, perhaps
TSUNAMIIt may make a big splash
TSUNAMIResult of submarine activity
TSUNAMIWave of destruction
TSUNAMISalt shaker?
TSUNAMISeaquake sequel
TSUNAMISomething of earth-shaking concern?
TSUNAMICoastal hazard
TSUNAMIKiller wave
TSUNAMIHuge tidal wave
TSUNAMIScary cry on a beach