5 stories to follow: March 5

The scene of the house explosion in Ewing, NJ on Tuesday, March 4, 2014. (Stephanie Aaronson/Philly.com)

Here's your daily look at five stories to know about:

1. House explosion: Authorities are continuing to investigate a home explosion in Ewing, Mercer County, that left one person dead, seven injured and scores displaced. The incident occurred as PSE&G workers arrived to investigate a gas line believed to have been damaged when it was struck by contractors.

2. Union contract vote: A ratification vote for a new contract for Philadelphia's white-collar union workers is scheduled for today. The tentative agreement reached last week ends a five-year stalemate.

3. Railroad safety: A hearing on the safety of transporting crude oil by railroad in Pennsylvania will take place tonight in Delaware County. The hearing comes in the wake of a fiery December train wreck in North Dakota and a January derailment on a bridge over the Schuylkill River.

4. Affordable housing: A housing advocacy group is expected to ask an appeals court in New Jersey today to instruct a special authority to create new rules about affordable housing. The Christie administration missed a deadline for rewriting rules to determine the number of homes municipalities need to provide for low-income residents, and the Cherry Hill-based Fair Share Housing Center wants a special master appointed to oversee the development of the new rules.

5. Adegbile vote: The U.S. Senate is considering President Obama's nomination of Debo Adegbile to lead the Justice Department's Civil Rights Division. The nomination has become contentious because Adegbile worked for the NAACP's Legal Defense Fund, which has represented convicted Philadelphia cop-killer Mumia Abu-Jamal and helped get his death sentence overturned.