Also some very useful advice from Nigel Latta here:
http://www.goldfishwisdom.org/parents/coping-with-disasters
And further sites that may be of some help:
http://www.theworrybug.co.nz/
http://allright.org.nz/what-makes-us-feel-all-right/
http://www.education.govt.nz/school/student-support/emergencies/tips-and-tools/