Five Things You Need to Know Today, Feb. 15

1. Weather: Expect a mostly cloudy Wednesday. High temperatures could reach 50 with an overnight low of 30.

2. Presidential elections: Today is the last day to register to vote for the presidential primaries. For more information, head over to the Town Clerk's website.

3. Arlington Alerts: Town officials are encouraging residents to register for Arlington Alerts, a new emergency communication system that will replace the current reverse 911 program. .

4. Claim your Patch listing: Are you a business owner in Arlington looking for more ways to connect with local customers? Take a minute to  and find out how to do just that. It's free and it takes only five steps.

5. This day in history: A massive explosion of unknown origin sinks the battleship USS Maine in Cuba's Havana harbor, killing 260 of the fewer than 400 American crew members aboard.