The North Bay is gearing up for some of its hottest weather this summer, with inland temperatures climbing into the mid-to-upper 90s through Sunday. The Press Democrat reports locations across inland Sonoma and Napa counties could hit 100 degrees on Saturday, prompting health officials to warn residents to stay hydrated and limit outdoor afternoon activities. Fortunately, relatively light winds are expected to keep critical fire risks low despite the high heat and low afternoon humidity. Forecasters are also urging beachgoers to exercise extreme caution along the coast, warning of dangerous sneaker waves and strong rip currents throughout the weekend. Visitors are reminded to never turn their backs on the ocean and to stick to beaches monitored by lifeguards.