The volcano began erupting on Tuesday, spewing a massive ash plume up to 11 kilometers (7 miles) into the sky. Authorities swiftly raised the alert status to the highest level, citing serious risks to air travel and nearby communities. A second eruption followed on Wednesday morning, producing an ash column 1 kilometer (0.6 miles) high.

Indonesia’s Transportation Ministry reported that at least 26 international and domestic flights were cancelled or delayed, affecting over 14,000 passengers. Flights from India, Singapore, and Australia were among the most impacted, according to data from Bali’s international airport.

Singapore Airlines cancelled four flights between Denpasar and Singapore, while Scoot, its budget subsidiary, also suspended flights to both Bali and neighboring Lombok.

JetStar, Qantas' low-cost airline, canceled multiple morning flights from Australia to Bali and warned of delays to afternoon services. In a midday travel update, the airline said it expected ash clouds to clear later in the evening.

AirAsia Malaysia and AirAsia Indonesia also confirmed cancellations and reschedules for flights to and from Bali, Lombok, and Labuan Bajo.

As a safety measure, the government shut down three airports in East Nusa Tenggara, including Fransiskus Xaverius Seda Airport in Maumere, with closures set to remain in effect through Thursday.

Local authorities also began evacuating residents from villages near the volcano as ash blanketed the surrounding areas.

Authorities continue to monitor volcanic activity closely. Travelers are advised to stay updated via official airline channels and expect delays while the situation develops.