California Winter

Which is the name of the Karl Shapiro poem with the bit I've been quoting for a while at this time of year:

It is raining in California, a straight rain
Cleaning the heavy oranges on the bough,
Filling the gardens till the gardens flow,
Shining the olives, tiling the gleaming tile,
Waxing the dark camellia leaves more green,
Flooding the daylong valleys like the Nile.