To climb.
To increase (something) in extent or intensity; to intensify or step up.
In technical support, to transfer a customer, a problem, etc. to the next higher level of authority
To swell or rise above (something, especially the rim of a container, the sides of something hollow, etc.).
To cause (something) to be too swollen or large; to become too swollen or large.
An excessive or sudden increase or flood (of something).