Scientists on Wednesday raised the alert level for Anak Krakatoa and Tangkuban Prahu -- which regularly spew gas and rumble -- from "normal" to "warning," the middle of three alert levels.
Iraqi security forces were placed on high alert and American aircraft —unpiloted reconnaissance drones flying low, and fighter jets roaring high above —crossed the capital.
Slow moving storms have soaked parts of Texas and Louisiana this week and millions of people in the region are under flash flood watches into Thursday.
It seems from research that our busy brains are always on guard, but when we get into nature it gets a break, there's not so much to be on the lookout for and we can relax.
Now, if somebody challenges it, like they question us for a joke we tell, or maybe we say our workforce is homogenous, or a slippery business expense, we go into red-zone defensiveness a lot of the time.
After a week of record rises here in France in terms of the number of new coronavirus cases, two extra cities on top of the four that entered the maximum alert category on Saturday will do so from tomorrow.
France remains on its highest level of security alert as the search continues for a gunman who shot dead two people near a Christmas market in Strasbourg on Tuesday.