Mini Heat Wave Drives Temperatures Well Above Normal Across Southern California

Southern California is experiencing a mini heatwave with temperatures expected to soar to triple digits on Friday, driven by a building high pressure system. The National Weather Service has issued heat advisories for the Santa Clarita and San Fernando valleys due to the risk of heat illness, especially for vulnerable populations. Temperatures in many areas will be 8 to 16 degrees above normal, with the High Desert also seeing highs near or above 100 degrees. A low pressure system will bring cooler temperatures and chances of showers starting Saturday, with a cooling trend continuing through midweek before another warming phase. Meanwhile, the UK is seeing a brief warm spell with temperatures around 25°C in parts of Suffolk and southern England, but it is not expected to qualify as an official heatwave according to Met Office criteria. The UK’s warmer weather follows a record dry spring, though a brisk breeze may keep conditions feeling cooler despite the sunshine.