Fears are mounting for the safety of a 50-year-old British woman who has been reported missing after being swept away by a 1.2-meter (3.9-foot) tsunami in Tonga on Saturday. The Hunga-Tonga-Hunga-Ha’apai volcano eruption had caused tsunami waves to hit and flood parts of Tonga’s capital, Nuku’alofa. No fatalities or serious injuries have been reported as…