Rainy Season Floods in Colombia

November 22, 2004

Two months of heavy rain have taken a toll on northern Colombia. The rainy season, which runs from October to December, started with several days of intense rain in early October and has continued with torrential downpours through November. Many international aid agencies are calling this the most damaging rainy season in many years as floods and landslides have claimed the lives of 19 people and left over 200,000 homeless. The Colombian government has declared a state of emergency in eight provinces.

These false-color images, acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite on November 22, and September 3, 2004, show many of the provinces that are being affected by floods. Water is black in the images and vegetation is a brilliant green. Clouds are light blue. The images contrast the regions around the Magdalena River and its tributaries before the rains started on September 3, 2004, and during a break in the clouds on November 22. On November 22, black water filled the wetlands around the river, and smudges of black along the river point to overflowing river banks.

The high resolution images provided above are at MODIS’ maximum resolution of 250 meters per pixel. Both the November 22 and September 3 images are available in additional resolutions from the MODIS Rapid Response Team.

NASA images courtesy Jacques Descloitres, MODIS Rapid Response Team at NASA GSFC