The National Weather Service says the rapid snowmelt is going to cause minor flooding on the Kennebec River in Maine and on the Connecticut River that separates New Hampshire and Vermont.
Meteorologist Eric Sinsabaugh said the Kennebec was already at flood stage Wednesday morning and that the Connecticut was to reach flood stage later in the day.
Both are expected to fall below flood stage by the end of Friday.
It's been warm this week. The National Weather Service says the temperature climbed Tuesday to 87 degrees in Concord, New Hampshire, and 78 degrees in Augusta, Maine, both records for the date. Montpelier, Vermont, had a record high of 77 degrees on Monday.