Environment Canada has issued rainfall and wind warnings for New Brunswick and forecasts up to 70 millimetres of rain in some Fundy areas.
The rainfall warning issued early Thursday says periods of sometimes heavy rain will spread across New Brunswick, with the highest amounts of rain expected in southeastern areas.
"Heavy downpours can cause flash floods and water pooling on roads," the warnings say. "Localized flooding in low-lying areas is possible."
Rainfall warnings are already in effect for southeastern New Brunswick.
The City of Saint John said the following roads are closed in because of localized flooding and rain:
McAllister Drive at Majors Brook Drive
Bayside Drive between 855 Bayside Drive and Expansion Avenue
McAllister Place entrance off Westmorland Road near Sport Chek.
Drivers are asked to avoid Haymarket Square due to water at the intersection.
Central, northeastern N.B. can expect up to 50 mm, high winds
Wind warnings issued for the Acadian Peninsula and the Miramichi area forecast gusts of up to 100 kilometres an hour Thursday.
"Gusty winds can damage soft shelters, tents and awnings at outdoor events," the warnings says. "Loose objects may be tossed by the wind and cause injury or damage."
An Environment Canada special weather statement also says 25 to 45 millimetres, and possibly more than 50, is also expected in central to northeastern New Brunswick.
"Moisture from the remnants of Hurricane Ida is expected to merge with a non-tropical weather system over the northeastern U.S. and bring significant rain to the province today and Friday," the statement says.
The statement says rain will likely persist well into Friday "as the system stalls over the Gulf of St. Lawrence. Due to this stalling, total amounts could locally exceed 50 mm."
CBC meteorologist Tina Simpkin said there's also a risk of thunderstorms in the Fundy area as well, with pockets of up to 100 millimetres of rain.
"Get ready," she said.
She said the winds will become southerly Thursday evening, with speeds of 20 km/h gusting to 50 km/h.
"The heavy rain is going to end overnight tonight," Simpkin said.
Heavy rain will change to drizzle Friday morning and is expected to taper off later in the day.