Based on the search results, here is a list of highways that are reported to be flooded in Massachusetts:

• Part of Route 2 in Leominster was shut down for a time due to flash flooding.
• There is no information on other highways that are flooded in Massachusetts from the search results.

It is important to note that these search results are time-sensitive and may not reflect the current situation. It is recommended to check with local news sources or authorities for the latest updates on flooded roads and highways in Massachusetts.