Overview
- The government will send an NL-Alert test message on Monday, 1 June 2026, at about 12:00 to verify the national public-alert system and public reception.
- Officials say the test message will clearly state it is a test and requires no action from recipients.
- Authorities warn the test will trigger a loud alarm tone and advise people to remove earphones or turn off headphones before the message arrives.
- The free NL-Alert App can improve reception for people who travel near borders because it can deliver alerts over mobile internet when phones connect to foreign masts that do not broadcast NL-Alert.
- The app supports phone accessibility settings, stores alerts for seven days, and had more than 6,400 users in Gelderland as of December 2025, making it a key tool for preparedness and inclusion.