We've just got word that Walla Walla High School has been closed for the day.

According to a press release, these are the details we have at this time...
This morning a student reported to the district that they received a report of a possible threat to the WaHi campus today. We are in contact with local authorities who are investigating the alleged threat. To ensure the safety of staff and students, school at WaHi is canceled today. All other schools are operating as normal.
Once additional information is available about the matter, including after school activities and other events at WaHi, we will communicate it out via the district's social media and news feeds.
We'll keep you abreast of the situation as we get more details on this continuing news story.