San Francisco firefighters battle a fire on Geary Boulevard in San Francisco, Wednesday, February 6, 2019. A gas explosion in a San Francisco neighborhood shot flames high into the air Wednesday and was burning four buildings as utility crews scrambled to shut off the flow of gas. Construction workers cut a natural gas line, San Francisco Fire Chief Joanne Hayes-White said. (Photo by Jeff Chiu/AP Photo)





In this Tuesday, January 22, 2019, photo, Mickie Subia retrieves her mail near her home in El Paso, Texas. Subia lives less than a block away from a border barrier that runs along the Texas-Mexico border in El Paso. (Photo by Eric Gay/AP Photo)





Steam rises from Lake Michigan on Friday morning, January 25, 2019, in Milwaukee. An arctic wave has wrapped parts of the Midwest in numbing cold, sending temperatures plunging and prompting officials to close dozens of schools Friday, but forecasters say the worst may be yet to come. (Photo by Carrie Antlfinger/AP Photo)





A woman walks below red lanterns hanging on Grant Avenue in San Francisco's Chinatown, Monday, February 4, 2019. A winter storm sweeping across California and Nevada has dumped at least 8 feet (2.4 meters) of snow over the past two days, with more expected. (Photo by Jeff Chiu/AP Photo)





U.S. Marines surveyors help rebuild the mountaintop runway with a concrete airstrip on storied Santa Catalina Island, Calif., Friday, January 25, 2019. About 100 Marines and sailors began working on the island this month under an agreement with the I Marine Expeditionary Force at Camp Pendleton, California, and the Catalina Island Conservancy. The airport dates to 1941, when it was built by leveling two mountaintops and filling in the remaining canyon to create the 3,000-foot (914-meter) main runway, which sits at an elevation of about 1,600 feet (488 meters) about 10 miles from the city of Avalon. (Photo by Damian Dovarganes/AP Photo)





Sledders slide down a hill on an inflatable bird, Saturday, February 9, 2019, at Wright Park in Tacoma, Wash. A winter storm that blanketed Washington state with snow moved south into Oregon Saturday and meteorologists warned that yet more winter weather was on the way. (Photo by Ted S. Warren/AP Photo)





Minneapolis Police Sgt. Grant Snyder, right, hands a cup of hot chocolate to Dawone Boclair outside the public library on Hennepin Avenue in downtown Minneapolis, as the temperatures dipped well below freezing, Tuesday, January 29, 2019. Snyder will be hitting the streets Tuesday and Wednesday night during the height of the big chill to check on the welfare of homeless people who haven't made it into a shelter. (Photo by Aaron Lavinsky/Star Tribune via AP Photo)





A person waits for donations at the exit from the Fred Meyer parking lot on South 19th street in Tacoma, Friday, February 8, 2019. (Photo by Peter Haley/The News Tribune via AP Photo)





Commuters wait for a train as snow falls Monday, January 28, 2019, in Chicago. The plunging temperatures expected later this week that have forecasters especially concerned. Wind chills could dip to negative 55 degrees in northern Illinois, which the National Weather Service calls “possibly life threatening”. (Photo by Kiichiro Sato/AP Photo)





Ice gathers on vehicles at Woodfield Mall in Schaumburg, Ill., Tuesday, February 5, 2019. The National Weather Service says an ice storm sweeping across northern Illinois is expected to end earlier than expected. (Photo by Patrick Kunzer/Daily Herald via AP Photo)





A woman walks along a flooded road in Guerneville, Calif., on Friday, February 15, 2019. In California, rainwater drained from saturated landscapes even as a new system moved into northern areas of the state and more heavy snow fell in the Sierra Nevada. (Photo by Josh Edelson/AP Photo)





US Sen. Kirsten Gillibrand, D-NY, shakes hands with Eric Tembas, originally from Somalia, while touring Main Street in Concord, N.H., Friday, February 15, 2019. Gillibrand visited New Hampshire as she explores a 2020 run for president. (Photo by Charles Krupa/AP Photo)





Jay Michael Tucker kayaks through the flooded Surrey Resort as the Russian River flows through it in Guerneville, Calif., on Friday, February 15, 2019. Streets and low-lying areas flooded as the Russian River swelled above its banks Friday. (Photo by Josh Edelson/AP Photo)





Technicians with Louisville Gas and Electric disconnect electric service from homes as flooding from the Ohio River inundated the area, Tuesday, February 12, 2019, near Louisville, Ky. (Photo by Bryan Woolston/AP Photo)





Gina Nakamura skis past a nearly life-size snow sculpture of an orca whale as downtown is just visible in a light snow Monday, February 11, 2019, in Seattle. Schools and universities closed across Washington state and the Legislature cancelled all hearings as the Northwest dealt with snow and ice and prepared for more as a series of winter storms socked the region. (Photo by Elaine Thompson/AP Photo)





A newspaper vendor on Third Avenue in midtown New York City displays a copy of the National Enquirer for a photographer at his newstand February 8, 2019. The publisher of the National Enquirer said Friday, February 8, 2019 it would open an internal probe of accusations by Amazon's Jeff Bezos over blackmail and extortion by the supermarket tabloid. Bezos, who publishes The Washington Post, said the Enquirer tabloid's parent company had threatened him if he did not halt his investigation into the motives behind the leak of intimate photos he sent to his mistress. (Photo by Timothy A. Clary/AFP Photo)





People bundled up in their hooded jackets wait for a a bus in subzero temperatures along 2nd Street Southwest Tuesday, January 29, 2019, in downtown Rochester, Minn. (Photo by Joe Ahlquist/The Rochester Post-Bulletin via AP Photo)





Media and others try to get a glimpse of former campaign adviser for President Donald Trump, Roger Stone, as he leaves federal court in Washington, Tuesday, January 29, 2019. Stone left the federal courthouse without speaking publicly after entering a not guilty plea to charges filed in the special counsel's Russia investigation. (Photo by Carolyn Kaster/AP Photo)





Fred Kuehn, owner of Lifestyle Cycle second from right, leads a group of cycling enthusiasts on a short ride to Bakers Square in Libertyville, Ill., Thursday, January 31, 2019. The painfully cold weather system holding much of the Midwest in a historic deep freeze sent temperatures plunging to a record low in northern Illinois on Thursday. (Photo by Steve Lundy/Daily Herald via AP Photo)





Volunteer Tim Schumann grills his lunch over an open flame in one of the warming areas Sunday, February 10, 2019, prior to Democratic Sen. Amy Klobuchar's announcement of her decision in the race for president at a rally in Minneapolis. (Photo by Anthony Souffle/Star Tribune via AP Photo)





The U.S. and Mexico border fence is seen in Tijuana, Mexico, January 27, 2019. (Photo by Shannon Stapleton/Reuters)