
Drone footage captured on the Reykjanes Peninsula shows the steadily advancing flow.
The volcano had stabilised since a 29 May eruption, the fifth and most powerful since the volcanic system reawakened in December after 800 years.
Authorities monitoring the lava flow said it was advancing significantly slower than during the previous two eruptions.
The same section of road, several kilometres (miles) from the town, was previously engulfed in February and March this year.
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