In the event of an actual earthquake, the only warning would be the shaking of the ground.

To prepare for the worst the Issaquah School District and Lake Washington School District joined more than 660,000 K-12 schools throughout the state last week for the 2015 Great Washington ShakeOut Earthquake drill, according to the official ShakeOut website.

Students, teachers and staff members practiced how to drop, cover and hold on Oct. 15 at 10:15 a.m.

“We are now going to have an earthquake drill,” said Eastlake High School Associate Principal Todd Apple on Oct. 15 over the school’s intercom system. “You are to immediately get under the desk or table closest to you. … Now that you are protected, please get down close to the ground. Lay down or sit and lean forward with your head close to your knees. Cover your head with one arm and grab the leg of the desk or table with your other hand. Close your eyes tightly.”

After this exercise, Apple instructed the school to evacuate to the stadium.

There were about 1,900 people in the building, Apple said.

The district equips the school with a radio system so staff can communicate in case the phone lines go down. The district checked these emergency systems after the school evacuated and students and teachers were given the all clear to return inside.

Worldwide, more than 22.6 million people participated in the drills last week, according to the official ShakeOut website.

In Washington state, more than 1.07 million participated in the drill this year, according to the data.

Sammamish city staff also participated in the Great ShakeOut exercise, Deputy City Manager Lyman Howard reported at the end of the Tuesday Sammamish City Council meeting.

After practicing crouching under their desks, staff, too, evacuated the building.

The city also activated the Emergency Operations Center, which would communicate with other pre-located neighborhood Emergency Communications Info Hub sites throughout the city. The sites create a common meeting place for citizens throughout the city. The city is broken into 11 zones; in the case of a disaster, citizens can go to their zone’s site for information, resources and to communicate with the city.

For more information on these hubs, visit www.sammamish.us/communitylinks/SammamishCitizenCorps.aspx.

For more information on the Great Shakeout drills, visit www.shakeout.org/washington/.