As I watched on TV during this monster storm Ian plowed through Florida, and it's projected path was originally pointed to Tampa Bay but end up landfalling south of it, they showed Tampa's Bay dry due to the water level being much lower being sucked up by the storm to throw against Naples and Fort Myers, I was thinking, that's the entire bay being siphoned dry from negative pressure.

So when a big storm moves over a city, will the negative pressure be such that it actually create enough negative pressure to suck the water out of all the p-traps into the vent pipes out from the top?

the bay is not 'siphoned' dry by negative pressure

the water is simply moved by the wind away from the shore in a reverse storm surge


? have you ever used a 'gas or electric blower' to blow away water puddles ?


however


traps have been known to rock enough to lose their prime in severe windstorms

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

traps don't rock, the water in them rocks.
so does bill haley..

..... 'round the clock .....




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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

Tornados can definitely suck the water from the traps. They can pull the asphalt off the the road.