We try the new zip line experience at a Kent watersports centre which sees you soar from a 33ft tower above a huge blue lake.

Water utilities in Altadena and Pacific Palisades are undertaking an arduous process of repressurizing their underground pipelines, testing for contaminants and attempting to flush them out.

While most people were trying to stay out of the rain on Thursday, a group of researchers was out in the thick of it ...