Typhoon Kalmaegi has left at least 26 people dead in the Philippines, mostly in flooding set off by the storm, which barreled across the central part of the country on Tuesday, disaster response officials said. Floodwaters trapped scores of people on their roofs and submerged cars.

A Philippine air force helicopter with five personnel on board crashed in a separate incident in southern Agusan del Sur province while flying to help provide humanitarian assistance to provinces battered by Kalmaegi.

The Super Huey chopper crashed near Loreto town and efforts were underway to locate the air force personnel aboard, the military’s Eastern Mindanao Command said in a statement.