List of numbers which you can call in case of an emergency:

Police (non-emergency)
+ 31 900 8844 (local call charges)
Doctors' after-hours service
+ 31 900 5138 039

Other phone numbers can be found in the telephone guide.

Every first Monday of each month at 12.00 noon, the city's emergency sirens are tested. Do not be alarmed. In the event of a real emergency, turn on your television or radio and tune in to a local station for further information.