Initial reports from witnesses at the scene were that a vehicle had ended up on its top.
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"So, if you see one of our patrol vehicles lit up near a school, do not be alarmed,"
The North Cascades Highway was aleady temporary closure.
Closures are due to power lines down and other storm-related hazards.
"If we do close, it's estimated that the water will recede enough by early tomorrow afternoon to reopen."
3 are expected to arrive Monday morning, 3 more Tuesday morning and 5 on Wednesday.
"This closure is for preliminary work associated with the Main Street Reconstruction Project."
It was reported about 2:20pm that the subject was in custody.
This is a developing story and will be updated as information becomes available.