Square kilometre

The fire broke out and spread to over 11 square miles in Orange County in Southern California on Monday.
Scientists have confirmed for the first time the presence of water on the moon’s sunlit surface.
There is the unnerving prospect the death toll would climb as searchers look for 16 missing people.
Dozens of fires are burning amid record-breaking temperatures, straining the state's electrical grid.
The state is currently in the grip of a brutal heat wave.