The Bay Area is currently under a rare March heat wave, causing temperatures to rise significantly above average. Coastal areas are seeing highs in the 70s, while inland regions are experiencing temperatures in the 80s and 90s. This unusual weather pattern is expected to continue, impacting areas like the SF Peninsula, East Bay, South Bay, and North Bay. Residents are advised to take precautions against heat-related illnesses, such as staying hydrated and avoiding strenuous activities during peak hours. The National Weather Service may issue heat advisories, so staying informed is crucial.