Heatwave set to peak with 34C temperatures possible22 minutes ago Share Save Nikki Berry BBC Weather Maia Davies BBC News Share SavePA MediaThe UK's third heatwave of the year is expected to peak on Saturday with temperatures soaring to a possible high of 34C. Temperatures are expected to be widely in the high 20s to low 30s in England and Wales on Saturday, while the mercury could rise to 33C or 34C in south Wales. Eastern parts of England will see slightly cooler temperatures thanks to an easterly breeze, but most areas will still meet heatwave thresholds. Even places such as Scotland's Western Isles could see unusually high temperatures due to the widespread nature of the heatwave. The amber heat health alerts cover southern England, the Midlands, and East Anglia and will remain in place until Monday, the UK Health Security Agency has said.