Aug. 16 marks the first day of school since an EF5 tornado ravaged Moore, Okla., on May 20, 2013.
Twenty-four people were killed -- including seven students at Plaza Towers Elementary School.
The storm struck near Newcastle, Okla., at 2:56 p.m.
This was 16 minutes after the first warnings went out, according to the National Weather Service.
Moore, Okla., residents had another 30 to 40 minutes before the massive storm entered the western part of the city, CNN meteorologist Sean Morris said.
A dog was found alive in the wreckage left by the Moore, Okla., tornado. Oklahoma County's sheriff tweeted: "Scared, but this little pup survived."
This shows some of the damage the day after.
An image from after a deadly storm ripped through Moore, Okla.
The sun rises over what was Plaza Towers Elementary School in Moore, Okla.
All 10 bowling pins in Lane 40 of the bowling alley in Moore, Okla., across the street from the damaged medical center and the damaged Warren movie theater.
The Moore Medical Center was one of the most heavily-damaged buildings.
Abandoned cars near a damaged tree in Moore, Okla.
Homes were completely leveled.
This neighborhood was one of the areas hardest hit by a tornado in Moore, Okla.
What's left of a bowling alley in Moore, Okla., following a tornado on May 20, 2013.
A teddy bear and children's book are seen in the rubble after a tornado hit Moore, Okla.
Crews from the Federal Emergency Management Agency on the ground in Moore, Okla.
Search and rescue teams in Moore, Okla., after a devastating tornado hit the town on May 20, 2013.
A view of Warren Theatre in Moore, Okla., following the May 20, 2013, tornado.
Destruction is seen in Moore, Okla., the day after a tornado came through.
Destruction is seen in Moore, Okla., the day after a devastating tornado.
The view of a Moore neighborhood that was in the path of the May 20, 2013, tornado.
"We survived" is written on the side of one home in Moore, Okla., following the May 20, 2013, storm.
Warren Theater in Moore, Okla., was damaged by a massive tornado on May 20, 2013.
A home on Eagle Drive in Moore, Okla., that was destroyed by the May 20, 2013, tornado.
A rescue worker and a dog rest during the search of rubble left by the Oklahoma tornado.
A woman searches the rubble after the deadly Oklahoma tornado.
Keepsakes found in the rubble are collected after the deadly Oklahoma tornado.
An image from after a deadly tornado in Oklahoma.
The deadly Oklahoma tornado threw cars around like they were toys.