Grows Rapidly

Canon EOS 60D, Sigma 8-16mm f/4.5-5.6 DC HSM (8mm, f/8, 178 sec, ISO-100)

The hotter it gets, the longer the weeds grow.  As we are going into the midst of summer, it stays very hot even at night. The weeds along Tama River are growing rapidly in such good conditions.

Does anyone cut them down soon, or do they grow into the human-height monsters?