A pos­si­ble tor­na­do dam­aged a school and homes in Penn­syl­va­nia, the lat­est in a se­ries of pow­er­ful storms that swept much of the U.S. dur­ing the Memo­r­i­al Day hol­i­day week­end and killed at least 22 peo­ple.

No in­juries were re­port­ed, but there was roof dam­age Mon­day night to the high school and about six homes in Ma­hanoy City, Penn­syl­va­nia, said David Truskowsky, spokesper­son for the city’s fire de­part­ment. School was can­celed in the dis­trict Tues­day.

The city is about 70 miles north­east of Har­ris­burg, the state cap­i­tal.

The Na­tion­al Weath­er Ser­vice, which had is­sued a tor­na­do warn­ing for the area, planned to sur­vey the storm dam­age Tues­day morn­ing. Im­ages of fun­nel clouds were shared on so­cial me­dia.

Be­fore hit­ting Penn­syl­va­nia, de­struc­tive storms caused deaths in Texas, Ok­la­homa, Arkansas and Ken­tucky and were just north of an op­pres­sive, ear­ly-sea­son heat wave set­ting records from south Texas to Flori­da.

The death toll of 22 al­so in­clud­ed sev­en deaths in Cooke Coun­ty, Texas, from a tor­na­do that tore through a mo­bile home park Sat­ur­day, of­fi­cials said, and eight deaths across Arkansas.

Two peo­ple died in Mayes Coun­ty, Ok­la­homa, east of Tul­sa, au­thor­i­ties said. The in­jured in­clud­ed guests at an out­door wed­ding.

Ken­tucky Gov. Andy Beshear, who ear­li­er de­clared a state of emer­gency, said at a news con­fer­ence Mon­day that five peo­ple had died in his state.

More than 200,000 homes and busi­ness­es lacked elec­tric­i­ty Tues­day morn­ing in Ken­tucky, Texas, Arkansas, West Vir­ginia and Mis­souri, ac­cord­ing to Power­Outage.us.

Fore­cast­ers warned of a risk of se­vere thun­der­storms in Texas and Ok­la­homa on Tues­day, with the po­ten­tial for dam­ag­ing winds, large hail and flash flood­ing.

It’s been a grim month of tor­na­does and se­vere weath­er in the na­tion’s mid­sec­tion.

Tor­na­does in Iowa last week left at least five peo­ple dead and dozens in­jured. Storms killed eight peo­ple in Hous­ton this month. April had the sec­ond-high­est num­ber of tor­na­does on record in the coun­try. The storms come as cli­mate change con­tributes in gen­er­al to the sever­i­ty of storms around the world.

Harold Brooks, a se­nior sci­en­tist at the Na­tion­al Se­vere Storms Lab­o­ra­to­ry in Nor­man, Ok­la­homa, said a per­sis­tent pat­tern of warm, moist air is to blame for the string of tor­na­does over the past two months.

That air is at the north­ern edge of a heat dome bring­ing tem­per­a­tures typ­i­cal­ly seen at the height of sum­mer to late May.

The heat in­dex — a com­bi­na­tion of air tem­per­a­ture and hu­mid­i­ty to in­di­cate how the heat feels to the hu­man body — neared triple dig­its in parts of south Texas on Mon­day. Ex­treme heat was al­so fore­cast for San An­to­nio and Dal­las.

In Flori­da, Mel­bourne and Ft. Pierce set new dai­ly record highs Mon­day. Both hit 98 de­grees (36.7 Cel­sius). Mi­a­mi set a record high of 96 (35.5 Cel­sius) on Sun­day.

For more in­for­ma­tion on re­cent tor­na­do re­ports, see The As­so­ci­at­ed Press Tor­na­do Track­er.

As­so­ci­at­ed Press jour­nal­ists Sarah Brum­field, Kathy Mc­Cor­ma­ck, Aca­cia Coro­n­a­do, Jef­frey Collins con­tributed to this re­port.

BY  BRUCE SCHREIN­ER AND JULIO CORTEZ