Henry Winkler is among those claiming the deadly blazes ravaging L.A. are definitely arson … but unless he has some proof, fire officials tell The Fonz needs to chill.

Following yet another blaze that started Wednesday night — this time in the Hollywood Hills — HW exclaimed on X … “THERE IS an ARSONIST here in LA . May you be beaten you unrecognizable !!! The pain you have caused !!!”

Here’s the issue … there’s no way to know at this moment exactly where and how the series of fires started … but an investigation is underway, an L.A. Fire official tells .

Fires have torn through the Pacific Palisades, Altadena, the Hollywood Hills, Acton, and Sylmar, with embers swirling across the city sparking smaller blazes. At least 5 people have died as a result.

The L.A. department team investigating each fire is the arson squad — but that’s the team that investigates the cause of every major fire … it doesn’t mean arson is suspected at this point, we’re told.

Now, if Henry or anyone else has actual evidence there is an arsonist involved in any or all fires — that is something authorities are very much interested in knowing!