PORTLAND, Maine — Maine topped 1,000 COVID-19 deaths as the Delta variant continues to fill the state’s hospital beds, and Gov. Janet Mills used the “grim and unwelcome milestone” to press Tuesday for residents to get vaccinated. An additional 18 deaths recorded in the state since Saturday pushed the total to 1,002 since the pandemic began nearly 19 months ago, the Maine Center for Disease Control and Prevention reported Tuesday. Behind the numbers are “parents, grandparents, siblings, children, loved ones and friends, all valued members of our Maine community,” Mills said.