Via WSDOT:
AVOID EB 520 FROM SEATTLE** Multi-car crash blocking all lanes right before Montlake.
Need to head to Bellevue/Kirkland or beyond? Take I-90 or I-405. EB 520 remains blocked.
Again, EB 520 near Montlake and I-5 ramps to EB 520 blocked due to serious collision. Avoid it and use I-90 or I-405.