Heavy fog blanketed the Abu Dhabi coast on Thursday evening prompting the national weather centre to urge drivers to avoid the roads. The weather front is expected to last until 9am on Friday, the National Meteorology Centre said. The red warning - which means 'stop driving until visibility clears' - was extended to the Abu Dhabi city coast along the Corniche. A yellow warning was in place on much of the UAE's coast including in Dubai.