HELOTES, Texas (AP) — A San Antonio-area district will review safety procedures after three school buses were caught in flash flooding and nearly 20 people had to be rescued.

KENS-TV (http://bit.ly/1H2VZU2 ) reports a spokesman for the Northside Independent School District says all three drivers appeared to follow policy.

Pascual Gonzalez says roads were still passable Friday morning in the Helotes (hel-OH'-tis) area when buses set out on their routes.

The three buses ended up in high water. Gonzalez says all three drivers correctly used their cellphones to summon help.

Thirteen elementary school students and five adults were rescued by emergency responders and neighbors. Nobody was hurt.

Gonzalez says the district is attempting to retrieve security video from the buses, but the recording equipment might be damaged from the high water.