Nonsense like this is why I believe outdoor warning sirens are still incredibly important. Mobile alerts are not foolproof, and can be bungled horribly, and not everybody has their phone on them, or a phone at all. If there's a severe storm or tornado coming, you need to know ASAP. Sirens are an excellent way of getting people indoors, regardless of who's outside. I heard the Netherlands was considering decommissioning its countrywide siren system, which I thought was absolutely fucking stupid. What you posted proves exactly why.