You should be able to disable these alerts via the Wireless Emergency Alerts.

You cannot on many phones, and often phones will even lie when it says all categories are disabled, as some jurisdictions have laws against turning off some of the highest alert categories.

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grapheneos 34 minutes ago | parent [-]

GrapheneOS supports fully disabling wireless alerts via the Settings app. It's possible to disable it on other Android devices via ADB.

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b112 18 minutes ago | parent [-]

I've dealt with Android phones for which there was zero way to disable the highest alert, adb regardless. Unless you have root, it's often not possible.

Yes, GrapheneOS of course allows this.

	▲	grapheneos 13 minutes ago \| parent [-]
		ADB can be used to disable it without GrapheneOS by disabling the packages providing the high level implementation of wireless emergency alerts. It's not something most people can be expected to do though. It's actually a lot easier to install GrapheneOS via the web installer than using the CLI ADB shell. ADB is also quite dangerous and people can be tricked into giving very invasive access to malware with it. We're not recommending that people use ADB for this but rather just noting it can be done.