Early esults from Europe suggest a ZHR of 80-100 for the Perseids. This doesn’t mean you’ll see 80-100 Perseids per hour because that number assumes a dark sky and the radiant overhead. Still this does correspond to good rates for those of us in the US.
I just spent little over an hour outside (10:35-11:45 pm) and spotted 15 Perseids under a moderately bright sky with a limiting magnitude of +5.4. These numbers confirm that the ZHR is around 80. This all bodes well for a great display in a few hours when the radiant is much higher in the sky.