Brazil is investigating another four new potential cases of highly pathogenic avian influenza (H5N1) in wild birds, according to authorities from the state of Espirito Santo, where Brazil's first ever cases were confirmed this week.

In the Glenallen area, Yukon and Kuskokwim River communities, and Northwest Arctic floodwaters caused by snow melt and rapid warming have caused many communities to be flooded.

This is the quietest spring I’ve experienced. It’s not my hearing. The Merlin app is hardly picking any bird songs up.

A NOAA Ocean Exploration-led team has discovered what appears to be evidence of a large gas seep at a depth of nearly 1.4 miles (2,300 meters) along the Aleutian Trench. The discovery was found in data collected during the Seascape Alaska 1: Aleutians Deepwater Mapping expedition.

Shane Thompson, the N.W.T.'s minister of Environment and Climate Change as well as Municipal and Community Affairs, gave an update on the out-of-control wildfire burning near Hay River and the Kátł'odeeche First Nation since Sunday.

Air quality in Calgary remains poor as wildfire smoke blankets the city. The situation is expected to last through the long weekend.

However, numerous fishermen say the assessment of a decline in the stock doesn't match what they're seeing on the water, where haddock appear to them to be plentiful.

Officials say the floodwaters are swamping Alaska towns, tearing buildings from foundations, seeping into homes and covering roads. In Glennallen, the local utility is setting up Porta-Potties around the community, and area residents are asked to limit water usage. The state transportation department said there was water over a portion of the Glenn Highway on Monday, but the road remained open.

I have never seen so many little tunnels on my lawn before.

Breakup of the Yukon River over the weekend has led to serious flooding in Eagle, Circle and Fort Yukon.

“We spent the weekend outdoors camping on the peninsula and notices shoreline grasses has dried and shriveled.”

The invasive Pacific oyster is spreading rapidly in Oslofjord, causing injuries to bathers and threatening local ecosystems, with Oslo municipality now offering a reward for their removal.

A large ice flow washed two cars onto Leirbotnvann in Alta, while large blocks of ice blocked the E6.

When the fisherman Lars-Ivar Dale pulled up his net, he suddenly saw a species of fish he had never seen before. Fish scientist is now asking for help.

Twenty-three of the 25 fires so far this year were ignited by human activity. While this year’s heavy snowpack and cold spring pushed back the start to fire season in many parts of the state, climate change is generally causing an earlier snowmelt, said climatologist Rick Thoman.

The risk of wildfires remains high in the southern part of the N.W.T., and the forecast is calling for more hot, windy weather in the days ahead. That makes for "a dangerous, truly extraordinary combination for this time of year."