overswell

To swell or rise above (something, especially the rim of a container, the sides of something hollow, etc.).

In some years the river overswells its banks, causing widespread flooding.

Let floods o’erswell, and fiends for food howl on!

To cause (something) to be too swollen or large; to become too swollen or large.

[…] the rents of lands still grew higher upon every lease that expired, till they have arrived at the present exorbitance; when the frog, overswelling himself, burst at last.

1885, Richard Burton, The Book of the Thousand Nights and a Night, The Burton Club, Volume 1, Translator’s Foreward, p. xvi, My annotations avoid only one subject, parallels of European folk-lore and fabliaux which, however interesting, would overswell the bulk of a book whose speciality is anthropology.

An excessive or sudden increase or flood (of something).

[The trial] drew a crowd […] that almost stormed the City Hall corridors. Three policement were needed to keep back the overswell.

1983, Kenneth A. McClane, “From a Silent Center” in A Tree Beyond Telling, San Francisco: Black Scholar Press, p. 31, when no Jihad / opens the conceived / to distention, the reedy creek / to overswells / of mudwallow: