Write a compelling news report exploring the series of recent incidents on I-95 in Chesterfield County, including the dump truck overturning, the impact of a multi-vehicle crash that closed all southbound lanes, and the injuries sustained by firefighters responding to these emergencies. Delve into the causes of these accidents, reflections from local authorities, and the heightened focus on traffic safety measures to prevent future incidents. Highlight the importance of driver awareness and road safety as emphasized by Chesterfield Fire and EMS in light of these events.