Typhoon Kalmaegi, known in the Philippines as Typhoon Luis, was the 22nd depression and the 15th named storm of the 2014 typhoon season. Kalmaegi was the first storm to make landfall over the Philippines since Typhoon Rammasun, two months prior. The storm caused flooding in Southeast Asia during mid-September. Kalmaegi started as a disturbance near Palau that could become a tropical cyclone in the next few days. JTWC would designate it to Tropical Depression 15W. PAGASA also named the system Luis as the 11th named storm inside PAR. Environmental conditions became more conducive for intensification, which allowed 15W to intensify into a tropical storm and attained the name Kalmaegi. On September 13, the storm intensified into a Category-1 typhoon as it moved through open warm waters. Around 17:00 PHT on September 14, the eye of Kalmaegi made landfall in the coastal town of Divilacan, Isabela, bringing gusty winds and heavy rains in the area.

The 2014 Pacific typhoon season was a slightly below average season in terms of named storms, but featured the highest amount of Category 5 typhoons since 1997. This was mainly due to a developing El Niño that favors multiple powerful storms to form in the basin. The season formed twenty-three tropical storms, eleven typhoons, eight super typhoons, and seven Category 5 typhoons. The season's peak months August and September saw minimal activity caused by an unusually strong and a persistent suppressing phase of the Madden–Julian oscillation (MJO). The season ran throughout 2014, though most tropical cyclones typically develop between May and October. The season began with the development of Tropical Storm Lingling on January 18, and ended after Tropical Storm Jangmi which dissipated on January 1 of the next year.