A heat dome in the western US has caused mountain snow to melt prematurely, raising concerns for the upcoming fire season.

<img alt="Man pulls boy in ski helmet and short sleeves out of a puddle, as brown mountains rise in the background" height="349" src="https://i.cbc.ca/ais/5a5d6a1f-2835-4fa6-9b91-77ab0fa30459,1774885116772/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C0%2C4000%2C2250%29%3BResize%3D%28620%29" title="A man pulls his son out of a puddle of water at Keystone Ski Resort as temperatures reach into the mid 60s in Keystone, Colorado, U.S., March 21, 2026. " width="620" /><p>Mountains that normally see...