The heat wave poses several risks, particularly in the East Bay hills and interior valleys, where a dry northeast wind will increase fire danger overnight. Residents in areas like Antioch, Brentwood, and the South Bay should prepare for potentially uncomfortable conditions, especially in locations where temperatures remain elevated overnight. Vulnerable populations, such as the elderly and those without air conditioning, may face health risks due to prolonged heat exposure. Additionally, the warm and dry conditions could exacerbate wildfire risks in the region's hills and higher elevations.