They, like most people in Holland, speak English. You just need to remember to speak slower than usual as it's not their first language; which I know can be hard in emergency situations.
A list of Dutch words that might be handy in emergency situations:
Police = politie (po-lit-see)
Fire Department = brandweer (brand-weir)
Hospital = ziekenhuis (seek-en-haus)
Doctor = huisarts (haus-arts)
Dentist = tandarts (tand-arts)


