A town in Maine is shaken by a horrific explosion. A building was leveled by a propane blast that narrowly missed a school bus packed with kids. Don Dahler reports. Source

Ocean heatwaves known as the “blob” are responsible for toxic algae blooms that kill plankton, a key food source for marine life. Experts are concerned a massive blob that formed in the Pacific in 2015 is reforming. Jonathan Vigliotti explains. Source

Here’s a look at the top stories making headlines on the “CBS Evening News with Norah O’Donnell.” Source

Only one Supreme Court justice in U.S. history has been impeached – and even he wasn’t removed from the bench Source

Arkansas State coach Blake Anderson lost his wife last month to breast cancer Source

When her daughter was having a bad day, she laid on the floor, wrapped in a blanket — and an angel came by to comfort her Source

About 170 Explosive Detection Canines trained by U.S. officials are currently working abroad — and several in Jordan have died Source

Police say a man they arrested in a 2016 South Florida murder is also linked to three other killings 200 miles away Source

Police in Florida say Robert Tyrone Hayes, 37, is linked to the murders of at least four women spanning a decade in Daytona Beach and Palm Beach County. Hayes, who has been charged with only one of the murders, appeared in a Palm Beach County court Monday and was ordered held without bail. Source

World’s largest stockpile of emergency oil has been tapped only three times — it may be time for a fourth Source