This aerial image from video provided by KSTP-TV in Minneapolis, shows smoke rising from the Husky Energy oil refinery after an explosion Thursday, Ap...
This aerial image from video provided by KSTP-TV in Minneapolis, shows smoke rising from the Husky Energy oil refinery after an explosion Thursday, April 26, 2018, at the plant in Superior, Wis. Authorities say several people were injured in the explosion. (KSTP-TV via AP)
This image from video provided by WDIO-TV in Duluth, Minn., shows smoke rising from the Husky Energy oil refinery after an explosion and fire Thursday...
This image from video provided by WDIO-TV in Duluth, Minn., shows smoke rising from the Husky Energy oil refinery after an explosion and fire Thursday, April 26, 2018, at the plant in Superior, Wis. Authorities say several people were injured in the explosion. (WDIO-TV via AP)
This aerial image from video provided by KSTP-TV in Minneapolis, shows smoke rising from the Husky Energy oil refinery after an explosion Thursday, Ap...
This aerial image from video provided by KSTP-TV in Minneapolis, shows smoke rising from the Husky Energy oil refinery after an explosion Thursday, April 26, 2018, at the plant in Superior, Wis. Authorities say several people were injured in the explosion. (KSTP-TV via AP)
This photo provided by KQDS_FOX21 in Duluth, Minn., shows vehicles and personnel outside the Husky Energy oil refinery Thursday morning, April 26, 201...
This photo provided by KQDS_FOX21 in Duluth, Minn., shows vehicles and personnel outside the Husky Energy oil refinery Thursday morning, April 26, 2018, after a tank containing crude oil or asphalt exploded at the large refinery in Superior, Wis. Authorities say several people were injured. The flame at the right is a normal part of refinery operations. (Natalie Froistad/KQDS_FOX21 via AP)
This photo provided by KQDS_FOX21 in Duluth, Minn., shows personnel outside the Husky Energy oil refinery Thursday morning, April 26, 2018, after a ta...
This photo provided by KQDS_FOX21 in Duluth, Minn., shows personnel outside the Husky Energy oil refinery Thursday morning, April 26, 2018, after a tank containing crude oil or asphalt exploded at the large refinery in Superior, Wis. Authorities say several people were injured. The flame at center right is a normal part of refinery operations. (KQDS_FOX21 via AP)
This aerial image from video provided by KSTP-TV in Minneapolis, shows smoke rising from the Husky Energy oil refinery after an explosion and fire Thu...
This aerial image from video provided by KSTP-TV in Minneapolis, shows smoke rising from the Husky Energy oil refinery after an explosion and fire Thursday, April 26, 2018, at the plant in Superior, Wis. Authorities say several people were injured in the explosion. (KSTP-TV via AP)
This aerial image from video provided by KSTP-TV in Minneapolis, shows smoke rising from the Husky Energy oil refinery after an explosion and fire Thu...
This aerial image from video provided by KSTP-TV in Minneapolis, shows smoke rising from the Husky Energy oil refinery after an explosion and fire Thursday, April 26, 2018, at the plant in Superior, Wis. Authorities say several people were injured in the explosion. (KSTP-TV via AP)
This image from video provided by WDIO-TV in Duluth, Minn., shows smoke rising from the Husky Energy oil refinery after an explosion and fire Thursday...
This image from video provided by WDIO-TV in Duluth, Minn., shows smoke rising from the Husky Energy oil refinery after an explosion and fire Thursday, April 26, 2018, at the plant in Superior, Wis. Authorities say several people were injured in the explosion. (WDIO-TV via AP)
A fire at the Husky Energy oil refinery in Superior, Wis., seen from a police check point in Superior, Wis., on Thursday, April 26, 2018, rocked the r...
A fire at the Husky Energy oil refinery in Superior, Wis., seen from a police check point in Superior, Wis., on Thursday, April 26, 2018, rocked the refinery, injuring multiple people and forcing the evacuation of homes, schools and a hospital, and sending a plume of noxious smoke into the air. (Dan Kraker/Minnesota Public Radio via AP)
Residents are still not in their homes after a smoky refinery fire forced most of their northwestern Wisconsin community to evacuate.
Authorities posted an update Thursday night saying the fire at the Husky Energy oil refinery was out, but an evacuation order for residents of Superior remained in place.
A blast at the refinery injured at least 11 people, one of them seriously. Authorities say there are no fatalities and all workers are accounted for.
The fire was put out earlier Thursday but it reignited, sending up thick clouds of noxious black smoke that could be seen for miles.
A four-person team from the U.S. Chemical Safety Board will investigate the blast. The board makes safety recommendations after serious chemical incidents.
