Construction workers watched as a dust devil tornado formed on their site in the Philippines.

Zaldy Llanillo Basa said he was having lunch when he saw a small whirlwind rotating until it became a larger tornado in the town of Botolan in Zambales province on Tuesday (March 9).

He said: “I didn’t expect them to be formed so quickly and to be so stroong. It’s a good thing it didn’t hit my car.’

Dust devils are a type of whirlwind tornado that form when the sun heats a patch of land and the air above becomes warmer and rises quickly.

Cooler air then moves into the low-pressure gap left by the rising warm air. The new drafts of cooler air also heat up, rise and the cycle continues, picking up dust and debris making the spiral visible.