The Rim is an ever-expanding landmass. Accordingly, it experiences regular earthquakes.
These are apparently pre-programmed, such that Consul Ceanothus has figured out how to get her fortress to tell her about them in advance. In Literate Elfland, they can accordingly shut down the power lines and other delicate systems day-of and give plenty of evacuation alerts.
But the area affected by the earthquakes the Consul gets alerts of is broader than the area Literate Elfland controls. While the independent elves do not have power lines to be disrupted by earthquakes, or heavy houses to drop on their heads, they do have bodies of water that may create tsunamis, and trees which may fall.
Literate Elfland can't produce long-range UAVs themselves at reasonable cost yet, and the Consul doesn't have an easy time with any imports it would be strange to order a delivery of to her Earth house. So there's tame pterosaurs flying around with loudspeakers playing a warning in the local language.
"In a hand of normal days the ground moves and the sea rises a lot. Go to high flat open land. If you like this talk, it is from Word-Seeing Land nightfall-ward of here."
(Consul Ceanothus has figured out how to get GPS-like functionality from the sky lands. The loudspeakers are programmed with different messages depending on their location.)