If you are caught outdoors in the vicinity of a hazardous materials incident, you should try to move away from the release:

FEMA IS-366.A: Planning for the Needs of Children in Disasters Answers

Here are the FEMA IS-366.A: Planning for the Needs of Children in Disasters Answers

Here are the FEMA IS-100.C: Introduction to the Incident Command System, ICS 100 Answers