Kilauea's summit crater has started fountaining lava again, a draw for onlookers but a health risk for anyone downwind on the Big Island.

• Lava fountaining at Halemaʻumaʻu began mid-morning, kicking off the 54th episode of the ongoing eruption.
• It arrived at the early edge of the forecast window, which ran through Friday.
• County officials are warning about ash fall and Pele's hair, thin volcanic glass strands that irritate skin, eyes, and lungs.
• Communities downwind face the worst of the fallout, while the eruption stays inside the crater.

Outlook: The fountaining is expected to taper off within days before the next episode builds, with air quality the main concern until then.