This is the 4310th most frequent Portuguese word.
alertas
Warnings or alerts.
In this sentence, 'alertas' is used as a noun to indicate notifications or warnings regarding storms.
Os alertas de tempestade estão sendo monitorados.
Storm alerts are being monitored.
Here, 'alertas' is used as an adjective form derived from 'alerta', describing the state of being vigilant or watchful.
Ele sempre fica alertas quando há perigo.
He is always alert when there is danger.
In this case, 'alertas' is plural for 'alerta', referring to warnings or signals.